Akira Iguchi (Ph.D.)

iguchi.a (at) aist.go.jp

Team Leader

Natural Capital Diagnosis Technology Research Team

Integrated Research Center for Nature Positive Technology

The Research Institute of Geology and Geoinformation

Geological Survey of Japan (GSJ)

National Institute of Advanced Industrial Science and Technology (AIST)

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My main interests are mechanisms for 1) formation and maintenance of populations/communities in ecosystems, 2) environmental responses of organisms. My main approaches are genetics/genomics, field surveys, laboratory experiments, and big data analysis. I also aim to apply the basic knowledge obtained by researches to conservation and practical use of bioresources. I am also continuing collaborative researches through massive DNA information analysis and statistical methods.

Education:

2002 Bachelor of Integrated human studies, Kyoto University

2004 Master of Agriculture, Kyoto University

2008 Ph.D., James Cook University (Australia)

Academic employment:

2008 Research fellow, Faculty of Science and Technology, University of the Ryukyus

2009 Research fellow, Sesoko station, Tropical Biosphere Research Center, University of the Ryukyus

2011 JSPS Research fellow PD

2013 Assistant professor, Department of Bioresources Engineering, National Institute of Technology, Okinawa College

2018 Senior Researcher, Marine Geo-Environment Research Group, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST)

Book

1. Iguchi A, Hongo C (Eds.). Coral Reef Studies of Japan. Springer Nature Singapore. 2018.

Iguchi A*, Hongo C. Introduction for This Book: General Aspects of the Coral Reefs of Japan. In: Iguchi A, Hongo C (Eds.) Coral Reef Studies of Japan. Springer Singapore. 1-16. 2018.

Iguchi A*, Hongo C. Concluding Remarks: Future Perspectives on Coral Reef Studies of Japan– From Biology, Earth Science, and Conservation and Restoration. In: Iguchi A, Hongo C (Eds.) Coral Reef Studies of Japan. Springer Singapore. 175-176. 2018.

2. Suzuki A*, Iguchi A, Sakai K, Hayashi M, Nojiri Y. Succession of Ocean Acidification and its Effects on Reef-Building Corals. Coral Reefs of Eastern Asia under Anthropogenic Impacts. Takeuchi I, Yamashiro H (eds). pp 97–112. 2023.

Original articles *Corresponding author

1. Iguchi A*, Ueno M, Maeda T, Minami T, Hayashi I. Genetic population structure of the deep-sea whelk Buccinum tsubai in the Japan Sea. Fisheries Science 70:569-572. 2004.  

2. Iguchi A, Ito H, Ueno M*, Maeda T, Minami T, Hayashi I. Morphological analysis of a deep-sea whelk Buccinum tsubai in the Sea of Japan. Fisheries Science 71:823-828. 2005. 

3. Morita M*, Nishikawa A, Nakajima A, Iguchi A, Sakai K, Takemura A, Okuno M. Eggs regulate sperm flagellar motility initiation, chemotaxis, and inhibition in the coral, Acropora digitifera, A. gemmifera, and A. tenuis. Journal of Experimental Biology 209:4574-4579. 2006. 

4. Iguchi A*, Takai S, Ueno M, Maeda T, Minami T, Hayashi I. Comparative analysis on the genetic population structures of the deep-sea whelks Buccinum tsubai and Neptunea constricta in the Sea of Japan. Marine Biology 151:31-39. 2007. 

Introduced in "Deep-Sea Biodiversity: Pattern and Scale" (Michael A. Rex and Ron J. Etter eds. Harvard University Press).

5. Iguchi A*, Ito H, Ueno M, Maeda T, Minami T, Hayashi I. Molecular phylogeny of the deep-sea Buccinum species (Gastropoda: Buccinidae) around Japan; inter- and intraspecific relationships inferred from mitochondrial 16SrRNA sequences. Molecular Phylogenetics and Evolution 44:1342-1345. 2007. 

Introduced in "Deep-Sea Biodiversity: Pattern and Scale" (Michael A. Rex and Ron J. Etter eds. Harvard University Press).

6. Iguchi A, Márquez LM, Knack B, Shinzato C, van Oppen MJH, Willis BL, Hardie K, Catmull J, Miller DJ*. Apparent involvement of a β1-type integrin in coral fertilization. Marine Biotechnology 9:760-765. 2007. A. Iguchi and L.M. Marquez contributed equally to this work. 

Cover photo.

7. Knack B, Iguchi A, Shinzato C, Hayward DC, Ball EE, Miller DJ*. Unexpected diversity of cnidarian integrins: expression during coral gastrulation. BMC Evolutionary Biology 8:136. 2008. B. Knack and A. Iguchi contributed equally to this work. 

8. Iguchi A, Ueno M, Maeda T, Minami T, Toyohara H*, Hayashi I. Molecular-based method to distinguish sympatric deep-sea whelks, Buccinum striatissimum and Buccinum tenuissimum in the Sea of Japan. Plankton and Benthos Research 3:101-103. 2008. 

9. Shinzato C, Iguchi A, Hayward DC, Technau U, Ball EE*, Miller DJ*. Sox genes in the coral Acropora millepora: divergent expression patterns reflect differences in developmental mechanisms within the Anthozoa. BMC Evolutionary Biology 8:311. 2008. 

Featured article, highly accessed article. 

10. Morita M*, Iguchi A, Takemura A. Roles of calmodulin and Calcium/calmodulin-dependent protein kinase in flagellar motility regulation in the coral Acropora digitifera. Marine Biotechnology 11:118-123. 2009. 

11. Nakajima Y*, Nishikawa A, Isomura N, Iguchi A, Sakai K. Genetic connectivity of the broadcast-spawning coral Acropora digitifera analyzed by microsatellite markers in the Sekisei Reef, southwestern Japan. Zoological Science 26:209-215. 2009. 

12. Nakajima Y*, Nishikawa A, Iguchi A, Sakai K. Novel and cross-species amplifiable microsatellite markers in two Acropora species. Plankton and Benthos Research 4:38-41. 2009. 

13. Iguchi A, Morita M, Nakajima Y, Nishikawa A, Miller DJ*. In vitro fertilization efficiency in coral Acropora digitifera. Zygote 17:225-227. 2009. 

14. Suwa R, Nakamura M*, Morita M, Shimada K, Iguchi A, Sakai K, Suzuki A. Effects of acidified seawater on early life stages of scleractinian corals (Genus Acropora). Fisheries Science 76:93-99. 2010. 

H25 JSFS paper award.

15. Morimoto N*, Furushima Y, Nagao M, Irie T, Iguchi A, Suzuki A, Sakai K. Water quality variables across Sekisei reef, a large reef complex in Southwestern Japan. Pacific Science 64:113-123. 2010. 

16. Morita M, Suwa R*, Iguchi A, Nakamura M, Shimada K, Sakai K, Suzuki A. Ocean acidification reduces sperm flagellar motility in broadcast spawning reef invertebrates. Zygote 18:103-107. 2010. M. Morita, R. Suwa, and A. Iguchi contributed equally to this work.

Top 10 most-read articles (January, 2010). 

17. Nakajima Y*, Nishikawa A, Iguchi A, Sakai K. Gene flow and genetic diversity of a broadcast-spawning coral in northern peripheral populations. PLoS ONE 5:e11149. 

18. Iguchi A*, Shinzato C, Forêt S, Miller DJ. Identification of fast-evolving genes in the scleractinian coral Acropora using comparative EST analysis. PLoS ONE 6:e20140. 2011. 

19. Kaneko N, Kudodera T*, Iguchi A. Taxonomic study of shallow-water octopuses (Cephalopoda: Octopodidae) in Japan and adjacent waters using mitochondrial genes with perspectives on octopus DNA barcoding. Malacologia 54:97-108. 2011. 

20. Iguchi A*, Ozaki S, Nakamura T, Inoue M, Tanaka Y, Suzuki A, Kawahata H, Sakai K. Effects of acidified seawater on coral calcification and symbiotic algae on the massive coral Porites australiensis. Marine Environmental Research 73:32-36. 2012. 

21. Nakajima Y*, Nishikawa A, Iguchi A, Sakai K. The population genetic approach delineates the species boundary of reproductively isolated corymbose acroporid corals. Molecular Phylogenetics and Evolution 63:527-531. 2012. 

22. Inoue M*, Shinmen K, Kawahata H, Nakamura T, Tanaka Y, Kato A, Shinzato C, Iguchi A, Kan H, Suzuki A, Sakai K. Estimate of calcification responses to thermal and freshening stresses based on culture experiments with symbiotic and aposymbiotic primary polyps of a coral, Acropora digitifera. Global and Planetary Change 92-93:1-7. 2012. 

23. Nakajima Y*, Nishikawa A, Iguchi A, Sakai K. Regional genetic differentiation among northern high-latitude island populations of a broadcast-spawning coral. Coral Reefs 31:1125-1133. 2012. 

24. Hayashi E, Suzuki A*, Nakamura T, Iwase A, Ishimura T, Iguchi A, Sakai K, Okai T, Inoue M, Araoka D, Murayama S, Kawahata H. Growth-rate influences on coral climate proxies tested by a multiple colony culture experiment. Earth and Planetary Science Letters 362:198-206. 2013.

25. Tanaka Y*, Iguchi A, Inoue M, Mori C, Sakai K, Suzuki A, Kawahata H, Nakamura T. Microscopic observation of symbiotic and aposymbiotic juvenile corals in nutrient-enriched seawater. Marine Pollution Bulletin 68:93-98. 2013.  

26. Nishida K, Iguchi A, Ishimura T, Sakai K, Suzuki A*. The skeletal isotopic responses of the Scleractinian coral Isopora palifera to experimentally-controlled water temperatures. Geochemical Journal 48:e9 - e14. 2014. 

27. Nishida K, Ishikawa K, Iguchi A, Tanaka Y, Sato M, Inoue M, Nakamura T, Sakai K, Suzuki A*. Skeletal oxygen and carbon isotope compositions of Acropora coral primary polyps experimentally cultured at different temperatures. Geochemistry, Geophysics, Geosystems 15:2840-2849. 2014. 

28. Tanaka Y*, Iguchi A, Nishida K, Inoue M, Nakamura T, Suzuki A, Sakai K. Nutrient availability affects the response of juvenile corals and the endosymbionts to ocean acidification. Limnology and Oceanography 59:1468-1476. 2014. 

29. Iguchi A*, Kumagai NH, Nakamura T, Suzuki A, Sakai K, Nojiri Y. Responses of calcification of massive and encrusting corals to past, present, and future ocean carbon dioxide concentrations. Marine Pollution Bulletin 89:348-355.  A. Iguchi and N.H. Kumagai contributed equally to this work.

30. Iguchi A*, Suzuki A, Sakai K, Nojiri Y. Comparison of the effects of thermal stress and CO2-driven acidified seawater on fertilization in coral Acropora digitifera. Zygote 23:631-634. 2015.

31. Iwasaki S*, Inoue M, Suzuki A, Sasaki O, Kano H, Iguchi A, Sakai K, Kawahata H. The role of symbiotic algae in formation of coral primary polyp skeleton: 3D morphological study based on X-ray micro-CT. Geochemistry, Geophysics, Geosystems 17:3629-3637. 2016.

32. Fujita J*, Zenimoto K, Iguchi A, Kai Y, Ueno M, Yamashita Y. Comparative phylogeography to test for predictions of marine larval dispersal in three amphidromous shrimps. Marine Ecology Progress Series 560:105-120. 2016.

33. Ohno Y*, Iguchi A, Shinzato C, Inoue M, Suzuki A, Sakai K, Nakamura T. Aposymbiotic primary coral polyp counteracts acidification by active pH regulation. Scientific Reports 7:40324. 2017.

Introduced by news paper

34. Ohno Y*, Iguchi A, Shinzato C, Gushi M, Inoue M, Suzuki A, Sakai K, Nakamura T. Calcification process dynamics in coral primary polyps as observed using a calcein incubation method. Biochemistry and Biophysics Reports 9:289-294. 2017.

35. Ikeuchi E*, Ohno Y, Iguchi A, Nakamura T. Non-bleached colonies of massive Porites may attract fishes for selective grazing during mass bleaching events. PeerJ 5:e3470. 2017.

36. Nakamura T, Iguchi A*, Suzuki A, Sakai K, Nojiri Y. Effects of acidified seawater on calcification, photosynthetic efficiencies, and the recovery processes from strong light exposure in coral Stylophora pistillata. Marine Ecology 38:e12444. 2017. T. Nakamura and A. Iguchi contributed equally to this work. 

37. Nakajima Y*, Nishikawa A, Iguchi A, Nagata T, Uyeno D, Sakai K, Mitarai S. Elucidating the multiple genetic lineages and population genetic structure of the brooding coral Seriatopora (Scleractinia: Pocilloporidae) in the Ryukyu Archipelago. Coral Reefs 36:415–426. 2017.

38. Kuraya E*, Yamashiro R, Touyama A, Nakada S, Watanabe K, Iguchi A, Itoh S. Aroma Profile and Antioxidant Activity of Essential Oil from Alpinia zerumbet. Natural Product Communications 12:1321-1325. 2017. 

39. Sekizawa A, Uechi H, Iguchi A*, Nakamura T, Kumagai NH, Suzuki A, Sakai K, Nojiri Y. Intraspecific variations in responses to ocean acidification in two branching coral species. Marine Pollution Bulletin 122:282-287. 2017. A. Sekizawa, H. Uechi, and A. Iguchi contributed equally to this work.

40. Fujita J*, Drumm DT, Iguchi A, Ueda Y, Yamashita Y, Ito M, Tominaga O, Kai Y, Ueno M, Yamashita Y. Deep-sea phylogeographic structure shaped by paleoenvironmental changes and ongoing ocean currents around the Sea of Japan in a crangonid shrimp Argis lar. Zoological Science 34:406-413. 2017.

41. Bell T, Nishida K, Ishikawa K, Suzuki A, Nakamura T, Sakai K, Ohno Y, Iguchi A, Yokoyama Y*. Temperature controlled culture experiment using primary polyps of Acropora digitifera: their growth rate variation and skeletal Sr/Ca, Mg/Ca and Na/Ca. Palaeogeography, Palaeoclimatology, Palaeoecology 484:129-135. 2017.

42. Yoshioka Y, Tanabe T, Iguchi A*. The presence of genes encoding enzymes that digest carbohydrates in coral genomes and analysis of their activities. PeerJ 5:e4087. 2017.

43. Ikeuchi E*, Iguchi A, Nakamura T. Concentrated grazing scars made by fishes on non-bleached parts of a massive colony of Porites australiensis. The Biological magazine, Okinawa 56:53-56, 2018.

44. Yorisue T*, Yoshioka Y, Sakuma K, Iguchi A. Evaluating the occurrence of cryptic invasions of a rocky shore barnacle, Semibalanus cariosus, between Japan and the northeastern Pacific. Biofouling 34:183-189. 2018.

45. Taira J*, Toyoshima R, Ameku N, Iguchi A, Tamaki Y. Vanillin production by biotransformation of phenolic compounds in fungus, Aspergillus luchuensis. AMB Express 8:40. 2018.

46. Gushi M, Iguchi A, Takeuchi I*. Spawning of Acropora digitifera in an aquarium as recorded by continuous interval photography using an underwater camera. Plankton and Benthos Research 13:17-20. 2018.

47. Bell T*, Iguchi A  Suzuki A, Seki A, Yokoyama Y. Testing possible relationships between Acropora digitifera genes, seawater chemistry and skeletal elements. Geochemical Journal 52:263-272. 2018.

48. Kume D*, Iguchi A, Endoh H. Accelerated point of muscle deoxygenation during the 20-m shuttle-run test. Clinical Physiology and Functional Imaging 38:390-395. 2018.

49. Taira J*, Higa I, Tsuchida E, Isomura N, Iguchi A. Neurotransmitters in hermatypic coral, Acropora spp., and its contribution to synchronous spawning during reproductive event. Biochemical and Biophysical Research Communications 501:80-84. 2018.

50. Zaitsu K*, Noda S, Iguchi A, Hayashi Y, Ohara T, Kimura Y, Koketsu Y, Kosaki K, Kusano M, Sato T, Ishikawa T, Tsuchihashi H, Suzuki K, Ishii A. Metabolome analysis of the serotonin syndrome rat model: abnormal muscular contraction is related to metabolic alterations and hyper-thermogenesis. Life Sciences 207:550-561, 2018.

51. Iwasaki S*, Suzuki A, Iguchi A, Sasaki O, Kano H, Ohno Y, Enomoto K. Effect of seawater turbulence on formation of coral primary polyp skeletons. Coral Reefs 37:939-944, 2018.

52. Kume D*, Iguchi A, Endoh H. Onset of Accelerated Muscle Deoxygenation during 20-m Shuttle Run Test in Boys. Pediatric Exercise Science 30:474-479, 2018.

53. Aihara Y, Maruyama S, Baird AH, Iguchi A, Takahashi S*, Minagawa J*. Green fluorescence from cnidarian hosts attracts symbiotic algae. Proceedings of the National Academy of Sciences116:2118-2123, 2019. 

54. Nakabayashi A, Yamakita T, Nakamura T, Aizawa H, Kitano YF, Iguchi A, Yamano H, Nagai S, Agostini S, Teshima KM, Yasuda N*. The potential role of temperate Japanese regions as refugia for the coral Acropora hyacinthus in the face of climate change. Scientific Reports 9:1892, 2019. 

55. Iguchi A*, Sanmiya K, Watanabe K. Identification of ALMT and MATE as aluminum tolerance candidate genes from a typical acid soil plant, Psychotria rubura (Rubiaceae). PeerJ 7:e7739. 2019.

56. Suzuki S, Ataka M, Djukic I, Enoki T, Fukuzawa K, Hirota M, Hishi T, Hiura T, Hoshizaki K, Ida H, Iguchi A, Iimura Y, Ise T, Tanaka K, Kina Y, Kobayashi H, Kominami Y, Kurokawa H, Kobayashi M, Matsushita M, Miyata R, Muraoka H, Nakaji T, Nakamura M, Niwa S, Noh NJ, Sato T, Seino T, Shibata H, Suzuki R, Takahashi K, Tsunoda T, Utsumi Y, Watanabe K. Harmonized data on early stage litter decomposition using tea material across Japan. Ecological Research  34:575-576, 2019.

57. Iguchi A*, Yoshioka Y, Forsman ZH, Knapp ISS, Toonen RJ, Hongo Y, Nagai S, Yasuda N*. RADseq population genomics confirms divergence across closely related species in blue coral (Heliopora coerulea). BMC Evolutionary Biology 19:187, 2019. 

58. Zaitsu K*, Noda S, Ohara T, Murata T, Funatsu S, Ogata K, Ishii A, Iguchi A. Optimal inter-batch normalization method for GC/MS/MS-based targeted metabolomics with special attention to centrifugal concentration. Analytical and Bioanalytical Chemistry 411:6983–6994, 2019.

59. Sakai K*, Singh T, Iguchi A. Bleaching and post-bleaching mortality of Acropora corals on a winners and losers reef in 2016. PeerJ 7:e8138, 2019.

60. Mizuyama M*, Iguchi A, Gibu K, Iijima M, Reimer JD. Comparison of Symbiodiniaceae diversities in different members of a Palythoa species complex (Cnidaria: Anthozoa: Zoantharia) – implications for ecological adaptations to different microhabitats. PeerJ 8:e8449, 2020. 

61. Iguchi A*, Nishijima M, Yoshioka Y, Miyagi A, Miwa R, Tanaka Y, Kato S, Matsui T, Igarashi Y, Okamoto N, Suzuki A. Deep-sea amphipods around cobalt-rich ferromanganese crusts: taxonomic diversity and selection of candidate species for connectivity analysis. PLoS ONE 15:e0228483, 2020.

62. Sanmiya K*, Koja Y, Iguchi A. The cloning of cDNAs for the Heat-shock Transcription Factors HSFA1, HSFA2, and HSFA3 from Tobacco. Tropical Agriculture and Development 64:34-40, 2020. 

63. Zaitsu K*, Eguchi S, Ohara T, Kondo K, Ishii A, Tsuchihashi H, Kawamata T, Iguchi A. PiTMaP: A new analytical platform for high-throughput direct metabolome analysis by probe electrospray ionization/tandem mass spectrometry using an R software-based data pipeline. Analytical Chemistry 92:8514–8522, 2020. 

Cover photo.

64. Yorisue T*, Iguchi A*, Yasuda N, Yoshioka Y, Sato T, Fujita Y. Evaluating the effect of overharvesting on genetic diversity and genetic population structure of the coconut crab. Scientific Reports 10:10026, 2020. T. Yorisue and A. Iguchi contributed equally to this work. Selected as Scientific Reports Top 100 in Ecology 2020.

65. Yorisue T*, Iguchi A, Yasuda N, Yoshioka Y, Miyagi A, Mizuyama M, Fujita Y. Extensive gene flow among anchialine cave habitats in a stygobitic shrimp. Royal Society Open Science 7:191731. 2020.

66. Manullang C, Herwindra I, Iguchi A, Miyagi A, Tanaka Y, Nojiri Y, Sakai K*. Responses of branching reef corals Acropora digitifera and Montipora digitata to elevated temperature and pCO2. PeerJ 8:e10562. 2020.

67. Baird AH*, Guest JR, Edwards AJ, Bauman AG, Bouwmeester J, Mera H, ...Iguchi A, ...Yusuf S. An Indo-Pacific coral spawning database. Scientific Data 8:35. 2021.  

68. Iijima M, Yasumoto J, Iguchi A, Koiso K, Ushigome S, Nakajima N, Kunieda Y, Nakamura T, Sakai K, Yasumoto-Hirose M, Mori-Yasumoto K, Mizusawa N, Amano H, Suzuki A, Jimbo M, Watabe S, Yasumoto K*. Phosphates bound to calcareous sediments hamper skeletal development of juvenile coral. Royal Society Open Science 8:201214. 2021.

69. Fujita J*, Iguchi A, Tohkairin A, Hamatsu T, Kai  Y. First record of the deep-water Argis toyamaensis yokoya, 1933 (Decapoda, Crangonidae) in the sea of okhotsk, based on mitochondrial DNA sequences. Crustaceana 94:507-511, 2021.

70. Takata K, Iwase F, Iguchi A, Yuasa H, Taninaka H, Iwasaki N, Uda K, Suzuki T, Nonaka M, Kikuchi T, Yasuda N*. Genome-wide SNP data revealed notable spatial genetic structure in the deep-sea precious coral Corallium japonicum. Frontiers in Marine Science 8:667481. 2021.

71. Iguchi A*, Tada I, Nagano AJ, Yasuda N. Genetic structure of Pacific crown-of-thorns starfish (Acanthaster cf. solaris) in southern Japan based on genome-wide RADseq analysis. Coral Reefs 40:1379-1385, 2021. 

72. Fujita J*, Drumm DT, Iguchi A, Tominaga O, Kai Y, Yamashita Y. Small vs. large eggs: comparative population connectivity and demographic history along a depth gradient in deep-sea crangonid Argis shrimps. Biological Journal of the Linnean Society 134:650-666, 2021. 

73. Kawakami D, Tsuchiya M, Murata T, Iguchi A, Zaitsu K*. Rapid quantification of extracellular neurotransmitters in mouse brain by PESI/MS/MS and longitudinal data analysis using the R and Stan-based Bayesian state-space model. Talanta 231:122620, 2021. 

74. Shinzato C, Takeuchi T, Yoshioka Y, Tada I, Kanda M, Broussard C, Iguchi A, Kusakabe M, Marin F, Satoh N, Inoue M. Whole-genome sequencing highlights conservative genomic strategies of a stress-tolerant, long-lived scleractinian coral, Porites australiensis Vaughan, 1918. Genome Biology and Evolution 13:evab270, 2021. 

75. Bell T, Manullang C, Kumagai NH, Sakai K, Suzuki A, Iguchi A*. Calcification responses of subtropical corals to ocean acidification: a case study from Sesoko Island, Okinawa, Japan. Galaxea, Journal of Coral Reef Studies 24:51-61, 2022.

76. Bell T, Manullang C, Sakai K, Suzuki A, Iguchi A*. Near-future levels of pCO2 impact skeletal growth of coral primary polyps (Acropora digitifera). Galaxea, Journal of Coral Reef Studies 24:63-68, 2022.

77. Baird AH*, Edwards AJ, Guest JR, Harii S, Hatta M, Lachs L, ...Iguchi A, ...Yamazato K. A coral spawning calendar for Sesoko Station, Okinawa, Japan. Galaxea, Journal of Coral Reef Studies 24:41-49, 2022. 

78. Maeda A*, Kuroyanagi A, Iguchi A, Gaye B, Rixen T, Nishi H, Kawahata H. Seasonal variation of fluxes of planktic foraminiferal tests collected by a time-series sediment trap in the central Bay of Bengal during three different years. Deep-Sea Research Part I 83:103718, 2022.

79. Yamakita T*, Sodeyama F, Iguchi A, Kitano YF, Teshima KM, Shimura A, Nakabayashi A, Nagai S, Nakamura T, Aizawa H, Yasuda N. Consideration of Genetic Structure in the Ecologically and Biologically Significant Marine Areas (EBSA) Criteria: A Review of Convention on Biological Diversity (CBD) Regional Workshops and A Case Study of Coral Reef Conservation Planning. Frontiers in Marine Science 9:823009, 2022. 

80. Iijima M, Yasumoto J, Mori-Yasumoto K, Yasumoto-Hirose M, Iguchi A, Suzuki A, Mizusawa N, Jimbo M, Watabe S, Yasumoto K*. Visualisation of phosphate in subcalicoblastic extracellular calcifying medium and on a skeleton of coral by using a novel probe, fluorescein-4-isothiocyanate-labelled alendronic acid. Marine Biotechnology 24:524–530, 2022.

81. Zaitsu K*, Kawakami D, Chang J, Hisatsune K, Taniguchi M, Asano T, Iguchi A*. Metabolomics and data-driven bioinformatics revealed key maternal metabolites related to fetal lethality via Di(2‐ethylhexyl)phthalate (DEHP)-exposure in pregnant mice. ACS Omega  27:23717–23726, 2022.

82. Ohno Y, Iguchi A*, Iijima M, Yasumoto K, Suzuki A. Coastal ecological impacts from pumice rafts. Scientific Reports 12:11187, 2022.

83. Kise H*, Moritaki T, Iguchi A, Reimer JD. Epizoanthidae (Hexacorallia: Zoantharia) associated with Granulifusus gastropods (Neogastropoda: Fasciolariidae) from the Indo-West Pacific. Organisms Diversity & Evolution 22:543–554, 2022. 

84. Gibu K, Ikeuchi E, Bell T, Nakamura T, Yoshioka Y, Suzuki A,  Iguchi A*. Calcification rates of a massive and a branching coral species were unrelated to diversity of endosymbiotic dinoflagellates. Molecular Biology Reports 49:9101–9106, 2022. K. Gibu and E. Ikeuchi contributed equally to this work. 

85. Kushida Y*, Imahara Y, Wee HB, Fernandez-Silva I, Fromont J, Gomez O, Wilson N, Kimura T, Tsuchida S, Fujiwara Y, Higashiji T, Nakano H, Kohtsuka H, Iguchi A, Reimer JD. Exploring the trends of adaptation and evolution of sclerites with regards to habitat depth in sea pens. PeerJ 10:e13929, 2022.

86. Kitade S, Endo N, Nogata Y, Matsumura K, Yasumoto K, Iguchi A, Yorisue T*. Faint chemical traces of conspecifics delay settlement of barnacle larvae. Frontiers in Marine Science 9:983389, 2022. 

87. Hibino Y, Iguchi A, Zaitsu K*. Preliminary study to classify mechanisms of mitochondrial toxicity by in vitro metabolomics and bioinformatics. Toxicology and Applied Pharmacology 457:116316, 2022. 

88. Ikeuchi E*, Suzuki Y, Iguchi A, Suzuki A. Microbial community structure of surface sediments in the deep-sea area around the Tokara Islands, Japan. Bulletin of the Geological Survey of Japan 73:323–328, 2022.

89. Singh T, Sakai K*, Ishida J, Iguchi A. Short-term improvement of heat tolerance in naturally growing Acropora corals in Okinawa. PeerJ 11:e14629, 2023. 

90. Kise H, Iguchi A*, Ikegami T, Onishi Y, Goto K, Tanaka Y, Washburn TW, Nishijima M, Kunishima T, Okamoto N, Suzuki A. Genetic population structures of common scavenging species near hydrothermal vents in the Okinawa Trough. Scientific Reports 13:2348, 2023. H. Kise and A. Iguchi contributed equally to this work. 

91. Kise H*, Nishijima M, Iguchi A, Minatoya J, Yokooka H, Ise Y, Suzuki A. A new hexactinellid sponge-associated zoantharian from the northwestern Pacific Ocean. ZooKeys 1156:71–85, 2023.

92. Wada N, Iguchi A, Urabe Y, Yoshioka Y, Abe N, Takase K, Hayashi S, Kawanabe S, Sato Y, Tang SL*, Mano N*. Microbial mat compositions and localization patterns explain the virulence of black band disease in corals. npj Biofilms and Microbiomes 9:15, 2023. 

93. Kise H, Iguchi A*, Saito N, Yoshioka Y, Uda K, Suzuki T, Nagano AJ, Suzuki A, Iwasaki N. Genetic population structure of the precious coral Corallium japonicum in the Northwest Pacific. Frontiers in Marine Science 10:1052033,2023. H. Kise and A. Iguchi contributed equally to this work. 

94. Afzal MS, Takeuchi K, Iguchi A, Sakai K, Dirgantara D, Nakamura T*. An assessment of Ryukyu Archipelago's coral communities over a wide latitudinal range. Deep Sea Research Part II 208:105270, 2023.

95. Suda K*, Sakamoto S, Iguchi A, Tamaki H. Novel quantitative method for individual isotopomer of organic acids from 13C tracer experiments determines carbon flow in acetogenesis. Talanta 257:124328, 2023. 

96. Kise H*, Santos MEA, Fourreau CJL, Iguchi A, Goto R, Reimer JD. Evolutionary patterns of host switching, lifestyle mode, and the diversification history in symbiotic zoantharians. Molecular Phylogenetics and Evolution 182:107732, 2023. 

97. Manullang C, Singh T, Sakai K*, Miyagi A, Iwasaki A, Nojiri Y, Iguchi A. Separate and combined effects of elevated pCO2 and temperature on the branching reef corals Acropora digitifera and Montipora digitata. Marine Environmental Research 188:106030, 2023.

98. Washburn TW*, Iguchi A, Yamaoka K, Nagao M, Onishi Y, Fukuhara T, Yamamoto Y, Suzuki A. Impacts of the first deep-sea seafloor massive sulfide mining excavation tests on benthic communities. Marine Ecology Progress Series 712:1-19, 2023.

99. Ishida H*, Mukai R, Ikeuchi E, Kise H, Nishijima M, Iguchi A, Suzuki A, Suzumura M. Preliminary study on the acute effects of hydrogen sulfide on Amphipoda (Lysianassoidea; Pseudorchomene sp. and Anonyx sp.) collected from deep-sea floors in the Sea of Japan. Marine Pollution Bulletin 192:115102, 2023.

100. Ishida-Castañeda J*, Iguchi A, Sakai K. Changes in DNA methylation in response to heat stress and symbiotic conditions in coral primary polyps. Marine Ecology Progress Series 714:113-117, 2023.

101. Kushida Y*, Kise H, Iguchi A, Fujiwara Y, Tsuchida S. Description of the fifth sea pen species that attaches to hard substrates by modifying its peduncle. Deep-Sea Research Part I 104212, 2024. 

102. Ota Y*, Iguchi A, Nishijima M, Mukai R, Suzumura M, Yoshioka H, Suzuki A, Tsukasaki A, Aoyagi T, Hori T. Methane diffusion affects characteristics of benthic communities in and around microbial mat-covered sediments in the northeastern Japan Sea. Chemosphere 349:140964, 2024.

103. Maeda A*, Nishijima M, Iguchi A, Ota Y, Suzumura M, Suzuki A. Environmental DNA metabarcoding of foraminifera for biological monitoring of bottom water and sediments on the Takuyo-Daigo Seamount in the northwestern Pacific. Frontiers in Marine Science 10:1243713, 2024. 

105. Maruyama R, Yasumoto K, Mizusawa N, Iijima M, Yasumoto-Hirose M, Iguchi A, Hermawan OR, Hosono T, Takada R, Song K-H, Shinjo R, Watabe S, Yasumoto J*. Metagenomic analysis of the microbial communities and associated network of nitrogen metabolism genes in the Ryukyu limestone aquifer. Scientific Reports 14:4356, 2024. 

106. Hamamoto K, Iguchi A*, Gibu K, Ozawa H, Fujita Y. A discovery of the northernmost population of the giant mangrove whelk Terebralia palustris (Mollusca: Gastropoda: Potamididae) on Zamami Island and its genetic variability. Plankton and Benthos Research 19:60-65, 2024. 

107. Ikeuchi E*, Iguchi A, Nakamura T, Fukami H. Seasonal variation of grazing scars on massive Porites corals in Sekisei Lagoon, Okinawa, Japan. Galaxea, Journal of Coral Reef Studies 26: 3-8, 2024. 

108. Iguchi A*, Iijima M, Mizusawa N, Ohno Y, Yasumoto K, Suzuki A, Suga S, Tanaka K, Zaitsu K*. Single-polyp metabolomics for coral health assessment. Scientific Reports 14:3369, 2024. 

109. Iguchi A*, Hayashi M, Yorifuji M, Nishijima M, Gibu K, Kunishima T, Bell T, Suzuki A, Ono T. Whole transcriptome analysis of demersal fish eggs reveals complex responses to ocean deoxygenation and acidification. Science of the Total Environment 169484, 2024. 

110. Hisatsune K, Murata T, Taniguchi M, Asano T, Ogata K, Iguchi A, Zaitsu K*. Development of a rapid-fire drug screening method by probe electrospray ionization tandem mass spectrometry for human urine (RaDPi-U). Analytical and Bioanalytical Chemistry 416: 2503-2513, 2024. 

111. Kise H*, Saito N, Gibu K, Asato M, Kita T, Matsuzaki K, Iguchi A*. Population structure and genetic connectivity of the big blue octopus Octopus cyanea in the Ryukyu Archipelago, Japan. Aquatic Conservation: Marine and Freshwater Ecosystems 34: e4153, 2024.

112. Iguchi A*, Nishijima M, Ikeuchi E, Yokooka H, Sugishima H, Ikeda K, Miwa R, Sekido Y, Iwasaki N, Suzumura M, Tsukasaki A, Tanaka Y, Kato S, Minatoya J, Okamoto N, Kunishima T, Ise Y, Suzuki A*. Utilizing environmental DNA and imaging to study the deep-sea fish community of Takuyo-Daigo Seamount. npj Biodiversity 3:14, 2024. 

113. Manullang C*, Tarigan A, Iguchi A, Nakamura T. Intraspecific variation in response to elevated pCO2 and temperature in the branching reef coral Acropora digitifera from different habitats. Coral Reefs 43:1071–1081, 2024.

114. Iguchi A*, Gibu K, Yorifuji M, Nishijima M, Suzuki A, Ono T, Matsumoto Y, Inoue M, Fujii M, Muraoka D, Fujita Y, Takami H. Transgenerational acclimation to acidified seawater and gene expression patterns in a sea urchin. Science of the Total Environment 172616, 2024. 

115. Hamamoto K, Iguchi A*, Gibu K, Ozawa H, Kojima M, Mizuno S, Yoshioka Y, Saito N, Fujita Y*. Asymmetric patterns of genetic population structures in a mangrove whelk at the range edges. Science of the Total Environment 173248, 2024. K. Hamamoto and A. Iguchi contributed equally to this work. 

116. Hamamoto K*, Mizuyama M, Nishijima M, Maeda A, Gibu K, Poliseno A, Iguchi A*, Reimer JD. Diversity, Composition and Potential Roles of Sedimentary Microbial Communities in Different Coastal Substrates around Subtropical Okinawa Island, Japan. Environmental Microbiome 19:54, 2024. 

117. Ohno Y*, Takahashi A, Tsutsumi M, Kubota A, Iguchi A, Iijima M, Mizusawa N, Nakamura T, Suzuki A, Suzuki M, Yasumoto J, Watabe S, Sakai K, Nemoto T, Yasumoto K. Live imaging of center of calcification formation during septum development in primary polyps of Acropora digitifera. Frontiers in Marine Science 11:1406446, 2024.

118. Gibu K, Mizusawa N, Iijima M, Ohno Y, Yasumoto J, Yasumoto K, Iguchi A*. Polyamine impact on physiology of early stages of reef-building corals–Insights from rearing experiments and RNA-Seq analysis. Scientific Reports 14:23465, 2024. 

119. Kubota A, Ohno Y, Yasumoto J, Iijima M, Suzuki M, Iguchi A, Mori-Yasumoto K, Yasumoto-Hirose M, Sakata T, Suehiro T, Nakamae K, Mizusawa N, Jimbo M, Watabe S, Yasumoto K*. The role of polyamines in pH regulation in the extracellular calcifying medium of scleractinian coral spats. Environmental Science & Technology 58:22635−22645, 2024. 

120. Kise H, Reimer JD, Iguchi A, Ise Y, Tsuchida S, Fujiwara Y. Parazoanthidae (Cnidaria, Zoantharia) associated with glass sponges on the Nishi-Shichito Ridge, Northwestern Pacific Ocean, with the description of a new species. ZooKeys 1221:343–362, 2024. 

121. Shinozaki T*, Iguchi A, Nishijima M, Goto K, Fujino S. Identification of deposits from modern and ancient large tsunamis by means of environmental DNA. Scientific Reports  15:242, 2025. 

122. Bell T*, Iguchi A, Ohno Y, Sakai K, Yokoyama Y. Bioinformatic approach to explain how Mg from seawater may be incorporated into coral skeletons. Royal Society Open Science 12: 232011, 2025. 

123. Kawase K, Nakamura Y, Wolbeck L, Takemura S, Zaitsu K, Ando T, Jinnou H, Sawada M, Nakajima C, Rydbirk R, Gokenya S, Ito A, Fujiyama H, Saito A, Iguchi A, Kratimenos P, Ishibashi N, Gallo V, Iwata O, Saitoh S, Khodosevich K, Sawamoto K*. Significance of birth in the maintenance of quiescent neural stem cells. Science Advances 11:eadn6377. 2025.

126. Kamata M, Kitano YF, Iguchi A, Nozawa Y, Nagai S, Chen A, Wada N, Tang SL, Yamakita T, Taninaka H, Yasuda N*. Genetic divergence of Pocillopora damicornis between temperate and subtropical regions: the need to monitor hidden genetic lineage distribution with regard to migration-load risks under climate change. Bulletin of Marine Science 101:91-104, 2025. 

124. Iijima M*, Yasumoto K, Yasumoto J, Iguchi A, Yasumoto-Hirose M, Mori-Yasumoto K, Mizusawa N, Jimbo M, Sakai K, Suzuki A, Watabe S. Adverse effects of total phosphate load from the environment on the skeletal formation of coral juveniles.  Marine Pollution Bulletin 211:117395, 2025. 

125. Hiromatsu A, Gibu K, Suzuki A, Mizuyama M, Sakai K*, Iguchi A*. Comparison of phylotypic composition of endosymbiotic dinoflagellates of a coral, Acropora digitifera among coral reefs with different seawater temperatures at Okinawa Island, Japan. Coral Reefs 44:345-351, 2025. 

126. Yasumoto J, Iijima M, Iguchi A, Nakamura T, Takada R, Yasumoto-Hirose M, Iwasaki Y, Yasutaka T, Mori-Yasumoto K, Shinjo R, Yamazaki A, Mizusawa N, Ohno Y, Suzuki A, Watabe S, Yasumoto K*. Coral decline linked to exchangeable phosphate in seawater from coastal calcareous sediments, as evidenced in Sekisei lagoon, Japan. Marine Biotechnology 27:50, 2025. 

127. Hamamoto K*, Nishijima M, Gibu K, Suzuki A, Yamazaki J, Koeda K, Aoki N, Iguchi A*. Distinct community compositions of prokaryotes, eukaryotes, and fishes revealed through environmental DNA analysis at different salinities around Ishigaki Island, Okinawa, Japan. Environmental DNA 7:e70115, 2025. 

128. Ishida H*, Seo E, Iguchi A, Nishijima M, Ikeuchi E, Kise H, Suzuki A, Tsukasaki A, Suzumura M. Hydrogen sulfide, hypoxia, and low salinity tolerance of deep-sea amphipods (Pseudorchomene sp.) collected from the sea floor off Joetsu, Sea of Japan. Marine Pollution Bulletin 219:118340, 2025. 

129. Gibu K, Hamamoto K, Koeda K, Nishijima M, Kise H, Mizuyama M, Suzuki A, Aoki N, Yasuda N, Iguchi A*. Environmental DNA analysis at multiple taxonomic levels highlights geographic variation in subtropical coastal marine communities. Scientific Reports 15:20791, 2025. 

130. Huerlimann R*, Wee HB, Santos MEA, Kise H, Mizuyama M, Dudoit A, Jamodiong E, Satoh N, Soong GY, Kurihara H, Toonen RJ, Husnik F, Iguchi A, Ravasi T, Reimer JD. Shifts in Coral Reef Holobiont Communities in the High-CO2 Marine Environment of Iōtorishima Island. bioRxiv. PLOS Climate 4:e0000665, 2025. 

131. Kunishima T*, Takata K*, Nishikawa K, Gibu K, Nishijima M, Iguchi A. Genetic population structure of Japanese freshwater crab, Geothelphusa dehaani species complex (Decapoda: Potamidae) using genome-wide SNP. bioRxiv. Scientific Reports 15:23781, 2025. 

132. Yoshihara N*, Iguchi A, Nishijima M, Iijima M. Emergence of hotspots for redox reactions in response to earthquake-induced shallow landslides. Journal of Hydrology 662:133960, 2025.

133. Maeda A*, Hamamoto K, Nishijima M, Iguchi A, Suzuki A. Dinoflagellate diversity of large benthic foraminifera in harsh shallow-water environments. Coral Reefs 44:1197–1209, 2025. 

134. Takahashi-Kariyazono S*, Iguchi A, Terai Y*. Comparative genomics of two closely related Acropora coral species with different spawning seasons reveals genomic regions possibly associated with gametogenesis. BMC Ecology and Evolution 25:88, 2025. 

135. Saito N*, Iguchi A. Connectivity of coral reefs along the Kuroshio Current calls for transboundary conservation strategies. Ecology and Evolution 15:e72203, 2025. 

Reviews *Corresponding author

1. Forêt S, Kassahn K, Grasso LC, Hayward DC, Iguchi A, Ball EE, Miller DJ*. Genomic and microarray approaches to coral reef conservation biology. Coral Reefs 26:475-486. 2007. 

2.  Suwa R*, Iguchi A. A review of molecular phylogenetic studies on zooxanthella in scleractinian corals, with special reference to the North-West Pacific. Journal of the Japanese Coral Reef Society 10:13-23. 2008. (R. Suwa and A. Iguchi contributed equally to this work). (in Japanese)

3.  Suwa R, Nakamura T, Iguchi A, Masako Nakamura, Masaya Morita, Aki Kato, Kazuhiko Fujita, Mayuri Inoue, Kazuhiko Sakai, Atsushi Suzuki*, Isao Koike, Yoshihisa Sirayama, Yukihiro Nojiri. A review of the influence of ocean acidification on marine organisms in coral reefs. Oceanography in Japan 19:21-40. 2010. (R. Suwa, T. Nakamura, and A. Iguchi contributed equally to this work). (in Japanese)

4. Iguchi A*. A review of genetic intra- and interspecific relationships of deep-sea Buccinum and Neptunea species around Japan (with special reference to the Sea of Japan). Plankton and Benthos Research 5:83-89. 2010. 

5. Iguchi A*, Isomura N. A review on the acclimatization mechanism and possibility for adaptation of reef-building corals to environmental changes. Oceanography in Japan 21:147-158. 2012. (in Japanese)

6. Iguchi A*. Unveiling molecular basis of fertilisation in scleractinian corals using extensive genomic information. Current Bioinformatics 9:182-187. 2014. 

7. Kawahata H*, Fujita K, Iguchi A, Inoue M, Iwasaki S, Kuroyamagi A, Maeda A, Manaka T, Moriya K, Takagi H, Toyofuku T, Yoshimura T, Suzuki A. Perspective on the response of marine calcifiers to global warming and ocean acidification – Behavior of corals and foraminifera in a high CO2 world “hot house”. Progress in Earth and Planetary Science 6:5. 2019. 

8. Zaitsu K*, Eguchi S, Iguchi A. Bioinformatics and data science for mass spectrometric data analysis. Medical Mass Spectrometry 7:17-25. 2023. 

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