Keiichi Kakui Ph.D.
Faculty of Science, Hokkaido University, Japan
Lecturer
WoRMS Taxonomic editor (Tanaidacea)
Google Scholar Citation / ORCID / Twitter
Research Fields
1. Biology of Tanaidacea (Crustacea: Malacostraca: Peracarida)
- taxonomy, phylogeny, reproductive biology, sexual system, silk production, morphology, evolution, etc.
2. Taxonomy and phylogeny of aquatic invertebrates
- mainly focusing on peracarid crustaceans
Taken on 18 September, 2023
Education and Career
2002Apr–2006Mar B.c., Hokkaido Univ., Japan (Advisors: Shunsuke F Mawatari & Hiroshi Kajihara)
2006Apr–2008Mar M.c., Hokkaido Univ., Japan (Advisors: Shunsuke F Mawatari & Hiroshi Kajihara)
2008Apr–2011Mar D.c., Hokkaido Univ., Japan (Advisors: Shunsuke F Mawatari, Haruo Katakura, & Hiroshi Kajihara)
2010Apr–2011Mar JSPS Research Fellow (DC2), Hokkaido Univ., Japan (Advisors: Haruo Katakura & Hiroshi Kajihara)
2011Apr–2012Mar JSPS Research Fellow (PD), Hokkaido Univ., Japan (Advisor: Haruo Katakura)
2012Apr–2015Mar Researcher, Hokkaido Univ., Japan (Advisor: Matthew H Dick)
2015Apr– Lecturer, Hokkaido Univ., Japan
Papers (peer-reviewed) (AM, accepted manuscript; PreRef, pre-refereed author version; roPDF, read-only PDF)
Kakui K, Kajihara H, Mawatari SF (2007) Two new sphyrapodid species (Crustacea: Tanaidacea: Apseudomorpha) from southwestern Japan. Zootaxa 1563: 37–54. https://doi.org/10.11646/zootaxa.1563.1.4
Kakui K, Kajihara H, Mawatari SF (2010) A new species of Nesotanais Shiino, 1968 (Crustacea: Tanaidacea) from Japan, with a key to species and a note on male chelipeds. ZooKeys 33: 1–17. https://doi.org/10.3897/zookeys.33.296 PDF
Tomikawa K, Kakui K, Yamasaki H (2010) A new species of Psammogammarus (Amphipoda: Melitidae) from Kuchinoerabu Island, Japan, with a note on its feeding habits. Zoological Science 27: 615–626. https://doi.org/10.2108/zsj.27.615 PDF
Hiruta SF, Kakui K (2010) Digital illustration techniques using graphics software. TAXA, Proceedings of the Japanese Society of Systematic Zoology 29: 19–30. [in Japanese with English Abstract] https://doi.org/10.19004/taxa.29.0_19 PDF
Kakui K, Kajihara H (2011) Pseudosphyrapus cuspidiger sp. nov. from the Nansei Islands, Japan, with a supplementary description of Kudinopasternakia balanorostrata Kakui, Kajihara and Mawatari, 2007 (Crustacea: Tanaidacea: Apseudomorpha: Sphyrapodidae). In: Komai T, Komatsu H (Eds.) New Crustaceans of Japan 2. Bulletin of the National Museum of Nature and Science Supplement 5: 53–70. Link PDF
Shimomura M, Kakui K (2011) A new species of the genus Ingolfiella Hansen, 1903 (Peracarida, Amphipoda) from Ogasawara Islands, southern Japan. Crustaceana 84: 543–551. https://doi.org/10.1163/001121611X574308
Kakui K, Katoh T, Hiruta SF, Kobayashi N, Kajihara H (2011) Molecular systematics of Tanaidacea (Crustacea: Peracarida) based on 18S sequence data, with an amendment of suborder/superfamily-level classification. Zoological Science 28: 749–757. https://doi.org/10.2108/zsj.28.749 PDF
Kakui K, Kobayashi N, Kajihara H (2012) Phylogenetic position of Arctotanais in the suborder Tanaidomorpha (Peracarida: Tanaidacea). Journal of Crustacean Biology 32: 127–139. https://doi.org/10.1163/193724011X615406 AM PDF
Kakui K, Angsupanich S (2012) Birdotanais songkhlaensis, a new genus and species of Nototanaidae (Crustacea: Tanaidacea) from Thailand. Raffles Bulletin of Zoology 60: 421–432. Link PDF
Shimomura M, Kakui K (2012) A new species of Stegidotea Poore, 1985 (Isopoda: Chaetillidae) from Japan. Crustaceana Monographs 17: 303–314. https://doi.org/10.1163/9789004202894_025
Shimada D, Kakui K, Kajihara H (2012) A new species of deep-sea nematode, Micoletzkyia mawatarii sp. nov. (Nematoda: Enoplida: Phanodermatidae) from northern Japan. Species Diversity 17: 221–226. https://doi.org/10.12782/sd.17.2.221 PDF
Uyeno D, Kakui K, Nagasawa K (2013) New record of Cardiodectes medusaeus (Wilson, 1908) (Copepoda: Siphonostomatoida: Pennellidae) from a stranded pearly lanternfish, Myctophum nitidulum Garman (Myctophiformes: Myctophidae) from the Ryukyu Islands, southern Japan. The Biological Magazine Okinawa 51: 67–72. [in Japanese with English abstract] Link PDF
Kakui K, Hiruta C (2013) Selfing in a malacostracan crustacean: why a tanaidacean but not decapods. Naturwissenschaften 100: 891–894. https://doi.org/10.1007/s00114-013-1079-5 AM + Suppl roPDF
Kakui K, Angsupanich S (2013) Description of three species of Halmyrapseudes (Crustacea: Tanaidacea: Parapseudidae), with a discussion of biogeography. Zootaxa 3736: 345–367. https://doi.org/10.11646/zootaxa.3736.4.3 PreRef
Kakui K, Yamasaki H (2013) Nototanaids (Crustacea: Tanaidacea) from Japan, with the description of a new species of Nototanoides. Species Diversity 18: 245–254. https://doi.org/10.12782/sd.18.2.245 PDF
Kakui K, Hiruta C (2014) Diverse pereopodal secretory systems implicated in thread production in an apseudomorph tanaidacean crustacean. Journal of Morphology 275: 1041–1052. https://doi.org/10.1002/jmor.20281 AM roPDF PDF
Kakui K (2014) A novel transmission pathway: first report of a larval trematode in a tanaidacean crustacean. Fauna Ryukyuana 17: 13–22. PDF
Kohtsuka H, Kakui K, Kajihara H (2014) Northernmost records of Antedon serrata A. H. Clark from Hokkaido. Bulletin of the Biogeographical Society of Japan 69: 185–188 [in Japanese with English abstract]
Kakui K, Kohtsuka H (2015) Two new shallow-water species of Agathotanais (Crustacea: Tanaidacea) from Japan. Species Diversity 20: 45–58. https://doi.org/10.12782/sd.20.1.045 PDF
Kajihara H, Tomioka S, Kakui K, Iseto T (2015) Phylogenetic position of the queer, backward-bent entoproct Loxosoma axisadversum (Entoprocta: Solitaria: Loxosomatidae). Species Diversity 20: 83–88. https://doi.org/10.12782/sd.20.1.083 PDF
Kakui K, Naruse T (2015) Indoapseudes bamberi sp. nov. (Crustacea: Tanaidacea: Pagurapseudidae: Hodometricinae) from Iriomote Island, Ryukyu Islands, southwestern Japan. Zootaxa 3995: 138–148. https://doi.org/10.11646/zootaxa.3995.1.14
Shimada D, Kakui K (2015) First record of the free-living marine nematode Deontostoma magnificum (Timm, 1951) Platonova, 1962 (Nematoda: Leptosomatidae) from Japan. Nematological Research 45: 13–18. https://doi.org/10.3725/jjn.45.13 PDF
Nakano H, Kakui K, Kajihara H, Shimomura M, Jimi N, Tomioka S, Tanaka H, Yamasaki H, Tanaka M, Izumi T, Okanishi M, Yamada Y, Shinagawa H, Sato T, Tsuchiya Y, Omori A, Sekifuji M, Kohtsuka H (2015) JAMBIO Coastal Organism Joint Surveys reveals undiscovered biodiversity around Sagami Bay. Regional Studies in Marine Science 2 supplement: 77–81. https://doi.org/10.1016/j.rsma.2015.05.003
Uyeno D, Kakui K (2015) The first record of a species of Clausiidae (Copepoda: Cyclopoida) from Japanese waters, with the proposal of a new genus. Species Diversity 20: 153–158. https://doi.org/10.12782/sd.20.2.153 PDF
Kajihara H, Kakui K, Yamasaki H, Hiruta SF (2015) Tubulanus tamias sp. nov. (Nemertea: Palaeonemertea) with two different types of epidermal eyes. Zoological Science 32: 596–604. https://doi.org/10.2108/zs140250 PDF
Kakui K (2016) Descriptions of two new species of Rhizorhina Hansen, 1892 (Copepoda: Siphonostomatoida: Nicothoidae) parasitic on tanaidacean crustaceans, with a note on their phylogenetic position. Systematic Parasitology 93: 57–68. https://doi.org/10.1007/s11230-015-9604-x AM roPDF
Kaji T, Kakui K, Miyazaki N, Miura K, Palmer AR (2016) Mesoscale morphology at nanoscale resolution: serial block-face scanning electron microscopy reveals fine 3D detail of a novel silk spinneret system in a tube-building tanaid crustacean. Frontiers in Zoology 13: 14. https://doi.org/10.1186/s12983-016-0146-0 PDF
McClain CR, Barry JP, Eernisse D, Horton T, Judge J, Kakui K, Mah CL, Wáren A (2016) Multiple processes generate productivity-diversity relationships in experimental wood-fall communities. Ecology 97: 885–898. https://doi.org/10.1890/15-1669.1 AM PDF
Hiruta SF, Kakui K (2016) Three new brackish-water thalassocypridine species (Crustacea: Ostracoda: Paracyprididae) from the Ryukyu Islands, southwestern Japan. Zootaxa 4169: 515–539. https://doi.org/10.11646/zootaxa.4169.3.6
Tomioka S, Kondoh T, Sato-Okoshi W, Ito K, Kakui K, Kajihara H (2016) Cosmopolitan or cryptic species?―A case study of Capitella teleta (Annelida: Capitellidae). Zoological Science 33: 545–554. https://doi.org/10.2108/zs160059 PDF
Narahara-Nakano Y, Kakui K, Tomikawa K (2016) Opisa takafuminakanoi, a new species of Opisidae from Hokkaido, Japan (Crustacea: Amphipoda). Zootaxa 4200: 335–339. https://doi.org/10.11646/zootaxa.4200.2.9
Kajihara H, Kakui K (2016) An overview of recent marine-biodiversity research in Japan. pp. 25–45. In: Motokawa M, Kajihara H (eds) Species Diversity of Animals in Japan, Springer, Japan. https://doi.org/10.1007/978-4-431-56432-4_2 invited PDF
Kakui K (2016) Review of the taxonomy, diversity, ecology, and other biological aspects of Order Tanaidacea from Japan and surrounding waters. pp. 603–627. In: Motokawa M, Kajihara H (eds) Species Diversity of Animals in Japan, Springer, Japan. https://doi.org/10.1007/978-4-431-56432-4_23 invited AM PDF
Jimi N, Tsujimoto M, Watanabe K, Kakui K, Kajihara H (2017) A new species and the shallowest record of Flabegraviera Salazar-Vallejo, 2012 (Annelida: Flabelligeridae) from Antarctica. Zootaxa 4221: 477–485. https://doi.org/10.11646/zootaxa.4221.4.4 PDF
Komai T, Marin I, Kakui K (2017) Rediscovery and redescription of the abyssal squat lobster Munidopsis petalorhyncha Baba, 2005 (Crustacea: Decapoda: Munidopsidae) from the Northwest Pacific. Zootaxa 4226: 93–102. https://doi.org/10.11646/zootaxa.4226.1.4
Kakui K, Suzuki A, Nakano H, Kohtsuka H (2017) Habitat of a tanaidacean Apseudes nipponicus Shiino, 1937. Bulletin of the Kitakyushu Museum of Natural History and Human History Series A (Natural History) 15: 1–3. https://doi.org/10.34522/kmnh.15.0_1 PDF
Kakui K, Hayakawa Y, Katakura H (2017) Difference in size at maturity in annual and overwintering generations in the tanaidacean Zeuxo sp. in Oshoro Bay, Hokkaido, Japan. Zoological Science 34: 129–136. https://doi.org/10.2108/zs160134 PDF + Suppl
Kakui K, Shimada D (2017) A new species of Tanaopsis (Crustacea: Tanaidacea) from Japan, with remarks on the functions of serial ridges and grooves on the appendages. Zootaxa 4282: 324–336. https://doi.org/10.11646/zootaxa.4282.2.6 AM
Bayartogtokh B, Shimano S, Hagino W, Kakui K, Hiruta SF, Hartini S (2017) Morphology of a newly recorded species, Eremaeozetes octomaculatus Hammer, 1973 from Indonesia (Acari: Oribatida: Eremaeozetidae), with its genetic information. International Journal of Acarology 43: 444–449. https://doi.org/10.1080/01647954.2017.1341548
Kakui K, Hiruta C (2017) Tube construction by a tanaidacean crustacean using a novel mucus secretion system involving the anal opening. Zoological Letters 3: 20. https://doi.org/10.1186/s40851-017-0082-7 PDF
Tanabe Y, Hayashi R, Tomioka S, Kakui K (2017) Hexapleomera urashima sp. nov. (Crustacea: Tanaidacea), a tanaidid epibiotic on loggerhead sea turtles at Yakushima Island, Japan. Zootaxa 4353: 146–160. https://doi.org/10.11646/zootaxa.4353.1.9
Shimada D, Suzuki AC, Tsujimoto M, Imura S, Kakui K (2017) Oncholaimus langhovdensis sp. nov. (Nematoda: Enoplea: Oncholaimida), a new species of free-living marine nematode from Langhovde, Dronning Maud Land, East Antarctica. Species Diversity 22: 151–159. https://doi.org/10.12782/specdiv.22.151 PDF
Nakano H, Miyazawa H, Maeno A, Shiroishi T, Kakui K, Koyanagi R, Kanda M, Satoh N, Omori A, Kohtsuka H (2017) A new species of Xenoturbella from the western Pacific Ocean and the evolution of Xenoturbella. BMC Evolutionary Biology 17: 245. https://doi.org/10.1186/s12862-017-1080-2 PDF
Kakui K, Fujita Y (2018) Haimormus shimojiensis, a new genus and species of Pseudozeuxidae (Crustacea: Tanaidacea) from a submarine limestone cave in Northwestern Pacific. PeerJ 6: e4720. https://doi.org/10.7717/peerj.4720 PDF
Kakui K, Tomioka S (2018) Tsuranarthrura shinsei, a new genus and species in Anarthruridae (Crustacea: Tanaidacea) from the Northwestern Pacific. Species Diversity 23: 61–68. https://doi.org/10.12782/specdiv.23.61 PDF
Nakano H, Miyazawa H, Maeno A, Shiroishi T, Kakui K, Koyanagi R, Kanda M, Satoh N, Omori A, Kohtsuka H (2018) Correction to: A new species of Xenoturbella from the western Pacific Ocean and the evolution of Xenoturbella. BMC Evolutionary Biology 18: 83. https://doi.org/10.1186/s12862-018-1190-5 PDF
Hiruta C, Kakui K, Tollefsen KE, Iguchi T (2018) Targeted gene disruption by use of CRISPR/Cas9 ribonucleoprotein complexes in the water flea Daphnia pulex. Genes to Cells 23: 494–502. https://doi.org/10.1111/gtc.12589 PDF
Kakui K, Tanabe Y (2018) First report of the chelonophilic tanaidid Hexapleomera urashima from an environment other than the surface of sea turtles. Fauna Ryukyuana 45: 5–8. PDF
Tomioka S, Kakui K, Kajihara H (2018) Molecular phylogeny of the family Capitellidae (Annelida). Zoological Science 35: 436–445. https://doi.org/10.2108/zs180009 PDF
Hosoda Y, Tomioka S, Kakui K (2018) First record of Hemichela nanhaiensis (Pycnogonida: Ammotheidae) from Japanese waters, with the first description of females. Species Diversity 23: 215–218. https://doi.org/10.12782/specdiv.23.215 PDF
Shimada D, Kakui K (2019) Two new and one known species of Phanodermatidae (Nematoda: Enoplida) from Sagami Bay, Japan. Zootaxa 4608: 484–500. https://doi.org/10.11646/zootaxa.4608.3.4
Kakui K, Uyeno D, Naruse T (2019) First molecularly confirmed conspecific male and female pair in Konariinae (Crustacea: Tanaidacea), with the description of a new species. Species Diversity 24: 49–60. https://doi.org/10.12782/specdiv.24.49 PDF
Kakui K, Shimomura M, Kimura S, Kimura T (2019) Topotype-based DNA barcode of the parasitic isopod Pseudione nephropsi (Bopyridae), with a supplementary morphological description. Species Diversity 24: 103–108. https://doi.org/10.12782/specdiv.24.103 PDF
Tanabe Y, Kakui K (2019a) Two Hexapleomera species from Japan, with a new species description and discussion of phylogenetic relationships within Hexapleomera (Crustacea: Tanaidacea). Zootaxa 4648: 318–336. https://doi.org/10.11646/zootaxa.4648.2.7
Kakui K, Hiruta C, Uyeno D (2019) Sexual system in the tanaidacean Falsapseudes bowmani (Crustacea: Malacostraca: Peracarida). Invertebrate Biology 138: e12257. https://doi.org/10.1111/ivb.12257 AM roPDF PDF
Kakui K, Nakano T (2019) On the authorship of the genus-group name Curtipleon (Crustacea: Tanaidacea: Metapseudidae). Species Diversity 24: 179–180. https://doi.org/10.12782/specdiv.24.179 PDF
Tanabe Y, Kakui K (2019b) First report of Teleotanaidae (Crustacea: Tanaidacea) from the Northwestern Pacific, with the description of a new species. Species Diversity 24: 181–187. https://doi.org/10.12782/specdiv.24.181 PDF
Kakui K (2019) Shell-exchange behavior in a hermit-crab-like tanaidacean (Crustacea: Malacostraca). Zoological Science 36: 468–470. https://doi.org/10.2108/zs190048 PDF
Kakui K, Fujita Y (2020) Paradoxapseudes shimojiensis sp. nov. (Crustacea: Tanaidacea: Apseudidae) from a submarine limestone cave in Japan, with notes on its chelipedal morphology and sexual system. Marine Biology Research 16: 195–207. https://doi.org/10.1080/17451000.2020.1720249 AM
Kakui K (2020) First record of a tanaidacean crustacean fed upon by an arrow worm (Chaetognatha). Bulletin of the Kitakyushu Museum of Natural History and Human History Series A (Natural History) 18: 1–4. https://doi.org/10.34522/kmnh.18.0_1 PDF
Homma R, Uyeno D, Kakui K (2020) Integrative taxonomy of Pseudolepeophtheirus longicauda (Crustacea: Copepoda: Caligidae) parasitic on Platichthys stellatus (Actinopterygii: Pleuronectidae). Parasitology International 78: 102135. https://doi.org/10.1016/j.parint.2020.102135 AM
Kakui K, Fujiwara Y (2020) First in situ observations of behavior in deep-sea tanaidacean crustaceans. Zoological Science 37: 303–306. https://doi.org/10.2108/zs200028 PDF
Tomikawa K, Kakui K, Fujiwara Y (2020) A new species of Nicippe from the Bering Sea (Crustacea, Amphipoda, Pardaliscidae), with a redescription of N. tumida. ZooKeys 965: 37–53. https://doi.org/10.3897/zookeys.965.51749 PDF
Kakui K, Uyeno D (2020) New replacement name for a homonym in Lepeophtheirus (Crustacea: Copepoda: Caligidae). Zootaxa 4852: 143–144. https://doi.org/10.11646/zootaxa.4852.1.9
Hosoda Y, Kakui K (2020) A new species of Pantopipetta (Pycnogonida: Austrodecidae) from the North Pacific, with a note on the palp articulation. Marine Biology Research 16: 390–395. https://doi.org/10.1080/17451000.2020.1758946 AM
Okamoto N, Oya Y, Kakui K (2020) A new species of Zeuxo (Crustacea: Peracarida: Tanaidacea) from Japan, with remarks on carapace pigmentation as a potentially useful taxonomic character. Marine Biology Research 16: 411–422. https://doi.org/10.1080/17451000.2020.1766693 AM
Kakui K, Nomaki H, Komatsu H, Fujiwara Y (2020) Unexpected low genetic differentiation between Japan and Bering Sea populations of a deep-sea benthic crustacean lacking a planktonic larval stage (Peracarida: Tanaidacea). Biological Journal of the Linnean Society 131: 566–574. https://doi.org/10.1093/biolinnean/blaa106 PDF + Suppl
Shimada D, Kakui K (2020) A new species of free-living marine nematode, Proplatycoma tsukubae sp. nov. (Enoplida: Leptosomatidae), from Japan. Species Diversity 25: 205–211. https://doi.org/10.12782/specdiv.25.205 PDF
Uyeno D, Kakui K, Watanabe HK, Fujiwara Y (2021) Dirivultidae (Copepoda: Siphonostomatoida) from hydrothermal vent fields in the Okinawa Trough, North Pacific Ocean, with description of one new species. Journal of the Marine Biological Association of the United Kingdom 100: 1283–1298. https://doi.org/10.1017/S0025315420001101 roPDF
Kakui K (2021) Tube-constructing paratanaoidean tanaidaceans (Crustacea: Peracarida): a brief review. Aquatic Animals AA2021: AA2021-4. https://doi.org/10.34394/aquaticanimals.AA2021.0_AA2021-4_4 PDF
Shimada D, Suzuki AC, Tsujimoto M, Imura S, Kakui K (2021) Two new species of free-living marine nematodes (Nematoda: Axonolaimidae and Tripyloididae) from the coast of Antarctica. Species Diversity 26: 49–63. https://doi.org/10.12782/specdiv.26.49 PDF
Munakata M, Tanaka H, Kakui K (2021) Heterocypris spadix sp. nov. (Crustacea: Ostracoda: Cypridoidea) from Japan, with information on its reproductive mode. Zoological Science 38: 287–296. https://doi.org/10.2108/zs200127 PDF
Kakui K, Kano Y (2021) First complete mitochondrial genome of a tanaidacean crustacean (Arctotanais alascensis). Zoological Science 38: 267–272. https://doi.org/10.2108/zs200167 PDF
Kakui K, Shiraki S (2021) Presumptive stridulatory organs in Paranthura cf. japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae). Journal of Crustacean Biology 41: ruab026. https://doi.org/10.1093/jcbiol/ruab026 AM
Kakui K, Fukuchi J, Shimada D (2021a) First report of marine horsehair worms (Nematomorpha: Nectonema) parasitic in isopod crustaceans. Parasitology Research 120: 2357–2362. https://doi.org/10.1007/s00436-021-07213-9 roPDF AM
Worsaae K, Hansen MJ, Axelsen O, Kakui K, Møller PR, Osborn KJ, Martínez A, Gonzalez BC, Miyamoto N, Fujita Y (2021) A new cave-dwelling genus and species of Nerillidae (Annelida) from the Ryukyu Islands, Japan. Marine Biodiversity 51: 67. https://doi.org/10.1007/s12526-021-01199-4 roPDF
Kakui K, Munakata M, Tanaka H, Hiruta C (2021b) Mismatch between similarity of mitochondrial gene order and phylogenetic distance in Podocopa (Crustacea: Ostracoda). Zoologischer Anzeiger 293: 145–148. https://doi.org/10.1016/j.jcz.2021.05.011 AM
Shiraki S, Shimomura M, Kakui K (2021) A new species of Expanathura (Crustacea: Isopoda: Anthuroidea) from Iriomote Island, Japan, with a note on male polymorphism. Zootaxa 5047: 377–390. https://doi.org/10.11646/zootaxa.5047.3.9
Kakui K, Fleming JF, Mori M, Fujiwara Y, Arakawa K (2021c) Comprehensive transcriptome sequencing of Tanaidacea with proteomic evidences for their silk. Genome Biology and Evolution 13: evab281. https://doi.org/10.1093/gbe/evab281 PDF
Kakui K, Komai T (2022) First record of Scutariella japonica (Platyhelminthes: Rhabdocoela) from Hokkaido, Japan, and notes on its host shrimp Neocaridina sp. aff. davidi (Decapoda: Caridea: Atyidae). Aquatic Animals 2022: AA2022-1. https://doi.org/10.34394/aquaticanimals.2022.0_AA2022-1 PDF
Shimada D, Kakui K (2022) Three free-living marine nematodes from Sagami Bay, Japan, with a description of Wiesoncholaimus jambio sp. nov. (Nematoda: Oncholaimidae). Zoological Science 39: 106–114. https://doi.org/10.2108/zs210053 PDF
Kakui K, Hiruta C (2022) Description of a new Hamatipeda species, with an 18S molecular phylogeny (Crustacea: Tanaidacea: Typhlotanaidae). Zoological Science 39: 140–146. https://doi.org/10.2108/zs210065 PDF
Shiraki S, Shimomura M, Kakui K (2022a) A new neotenous genus and species, Deltanthura palpus gen. et sp. nov. (Isopoda, Anthuroidea, Paranthuridae) from Japan, with a revised key to the genera in Paranthuridae. Zoosystematics and Evolution 98: 109–115. https://doi.org/10.3897/zse.98.81772 PDF
Kakui K (2022) Digenean metacercariae parasitic in a staurozoan cnidarian. Zoological Science 39: 215–218. https://doi.org/10.2108/zs210099 PDF
Munakata M, Tanaka H, Kakui K (2022) Taxonomy and natural history of Cavernocypris hokkaiensis sp. nov., the first ostracod reported from alpine streams in Japan. Zoosystematics and Evolution 98: 117–127. https://doi.org/10.3897/zse.98.80442 PDF
Kakui K, Shimada D (2022) Dive into the sea: first molecular phylogenetic evidence of host expansion from terrestrial/freshwater to marine organisms in Mermithidae (Nematoda: Mermithida). Journal of Helminthology 96: e33. https://doi.org/10.1017/S0022149X22000256 roPDF AM
Shiraki S, Kakui K (2022) Observations on predation in Paranthura japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae). Zoological Science 39: 270–274. https://doi.org/10.2108/zs210122 PDF
Hayakawa Y, Kakui K (2022) Biological notes on Zeuxo ezoensis Okamoto et al., 2020 (Crustacea: Peracarida: Tanaidacea). Aquatic Animals 2022: AA2022-10. https://doi.org/10.34394/aquaticanimals.2022.0_AA2022-10 PDF
Hirano K, Kakui K (2022) A new brackish tanaidacean, Sinelobus kisui sp. nov. (Crustacea, Peracarida, Tanaidacea), from Japan, with a key to Sinelobus species and barcode information from two loci. Zoosystematics and Evolution 98: 245–256. https://doi.org/10.3897/zse.98.84818 PDF
Shiraki S, Shimomura M, Kakui K (2022b) First report of Hyssuridae (Isopoda: Anthuroidea) from Japan, with the description of a new Kupellonura species. Nauplius 30: e2022023. https://doi.org/10.1590/2358-2936e2022023 PDF
Kakui K, Hiruta C (2022b) Protogynous hermaphroditism in Crustacea: a new example from Tanaidacea. Canadian Journal of Zoology 100: 481–487. https://doi.org/10.1139/cjz-2022-0033 AM AM
Okamoto N, Kakui K (2022) Integrative taxonomy of Zeuxo (Crustacea: Peracarida: Tanaidacea) from Japan, with the description of a new species. Biologia 77: 2497–2506. https://doi.org/10.1007/s11756-022-01121-8 roPDF AM
Tanaka M, Kakui K (2023) On the original publications for six tanaidacean names proposed by Sueo M. Shiino. Zootaxa 5231: 192–194. https://doi.org/10.11646/zootaxa.5231.2.6
Matsumoto Y, Kajihara H, Kakui K (2023a) A new species of Leipsuropus Stebbing, 1899 (Amphipoda: Podoceridae) from Japan. Nauplius 31: e2023005. https://doi.org/10.1590/2358-2936e2023005 PDF
Kakui K, Munakata M (2023) A new Sphaeronella species (Copepoda: Siphonostomatoida: Nicothoidae) parasitic on Euphilomedes sp. (Ostracoda: Myodocopa: Philomedidae) from Hokkaido, Japan, with an 18S molecular phylogeny. Systematic Parasitology 100: 121–131. https://doi.org/10.1007/s11230-022-10075-z roPDF AM
Okamoto N, Kakui K (2023) Phototaxis in two shallow-water Zeuxo species (Crustacea: Tanaidacea). Zoological Science 40: 203–207. https://doi.org/10.2108/zs220118 PDF
Kakui K, Fukuchi J, Ohta M (2023) Diexanthema hakuhomaruae sp. nov. (Copepoda: Siphonostomatoida: Nicothoidae) from the hadal zone in the northwestern Pacific, with an 18S molecular phylogeny. Acta Parasitologica 68: 413–419. https://doi.org/10.1007/s11686-023-00676-z roPDF AM
Kakui K, Fujita Y (2023) New sea spider species (Pycnogonida: Austrodecidae) from a submarine cave in Japan. Journal of the Marine Biological Association of the United Kingdom 103: e44. https://doi.org/10.1017/S0025315423000322 roPDF AM
Kakui K, Hiruta C (2023) Differential masculinization of the chelipeds in two simultaneously hermaphroditic Apseudes tanaidaceans (Crustacea: Malacostraca). Zoologischer Anzeiger 305: 23–27. https://doi.org/10.1016/j.jcz.2023.05.004 AM
Matsumoto Y, Kajihara H, Kakui K (2023b) Capropodocerus, a new genus in Podoceridae (Crustacea: Amphipoda) from Japan, with descriptions of two new species. Zootaxa 5336: 577–589. https://doi.org/10.11646/zootaxa.5336.4.8
Sato A, Arakawa K, Kakui K (2023) Two new species in Leptocheliidae (Crustacea: Peracarida: Tanaidacea) from Japan, with notes on their phylogenetic position and aspects of morphology. Zoologischer Anzeiger 306: 51–68. https://doi.org/10.1016/j.jcz.2023.06.006
Shimada D, Kakui K, Fujita Y (2023) A new species of free-living marine nematode, Fotolaimus cavus sp. nov. (Nematoda, Oncholaimida, Oncholaimidae), isolated from a submarine anchialine cave in the Ryukyu Islands, southwestern Japan. Zoosystematics and Evolution 99: 519–533. https://doi.org/10.3897/zse.99.109097 PDF
Nonaka M, Hanahara N, Kakui K (2023) A new species of Coralliidae (Cnidaria: Octocorallia) collected from eastern Japan. Species Diversity 28: 231–243. https://doi.org/10.12782/specdiv.28.231 PDF
Kakui K, Tsuyuki A (2024) Flatworm cocoons in the abyss: same plan under pressure. Biology Letters 20: 20230506. https://doi.org/10.1098/rsbl.2023.0506 AM
Kakui K, Hiruta C (2024) A smaller species releases proportionally larger juveniles in Apseudes (Crustacea: Peracarida: Tanaidacea). CBM-Cahiers de Biologie Marine 65: 35–37. https://doi.org/10.21411/CBM.A.F7E539FB AM PDF (will appear after 2yrs embargo, i.e. on 27Jan2026)
Sonoda T, Chiba S, Yamazaki T, Nobetsu T, Fujiya H, Komai T, Nunomura N, Shimomura M, Tomikawa K, Kakui K, Hosono T, Ito A, Fujita T, Kobayashi I, Goshima S (2024) Marine macroinvertebrate fauna of the shallow coastal waters of the Shiretoko Peninsula, a World Natural Heritage at Hokkaido, Japan. Plankton & Benthos Research 19: 1–16. https://doi.org/10.3800/pbr.19.1 PDF
Kakui K (2024a) Review on studies of fossils in Tanaidacea (Crustacea: Malacostraca: Peracarida). Fossils (Palaeontological Society of Japan) 115: 65–76. [in Japanese with English abstract] https://doi.org/10.14825/kaseki.115.0_65 PDF
Kakui K (2024b) A new parasitic barnacle (Crustacea, Cirripedia, Rhizocephala, Mycetomorpha) from the abyssal zone in the northwestern Pacific. Zoosystematics and Evolution 100: 385–390. https://doi.org/10.3897/zse.100.120887 PDF
Kakui K (2024c) Molecular phylogeny confirmed “Pseudolepeophtheirus” schmidti Gusev, 1951 is a member of Lepeophtheirus (Crustacea, Copepoda, Caligidae). Spixiana 46: 173–177. https://pfeil-verlag.de/publikationen/spixiana-zeitschrift-fuer-zoologie-band-46/ PDF
Shiraki S, Kakui K (2024) Description of a new Cruranthura species from the Miyako Islands, Japan, with its DNA barcode (Isopoda: Anthuroidea: Paranthuridae). Species Diversity 29: 65–72. https://doi.org/10.12782/specdiv.29.65 PDF
Kakui K (2024d) Brixitanais, a new substitution name for Brixia Jóźwiak, Drumm, Bird & Błażewicz, 2018 (Crustacea: Tanaidacea: Akanthophoreidae). Zootaxa 5458: 449–450. https://doi.org/10.11646/zootaxa.5458.3.9
Shiraki S, Kakui K (2024) Ontogenetic changes in pigmentation pattern in Mesanthura miyakoensis (Crustacea: Isopoda: Anthuridae). Zoological Science 41: 323–328. https://doi.org/10.2108/zs230122 PDF (will appear after 1yr embargo, i.e. on 22Apr2025)
Jiménez-Mejías P, Manzano S, Gowda V, Krell F-T, Lin M-Y, Martín-Bravo S, Martín-Torrijos L, Feliner GN, Mosyakin SL, Naczi RFC, Acedo C, Álvarez I, Crisci JV, Luceño Garcés M, Manning J, Saiz JCM, Muasya AM, Riina R, Meseguer AS, Sánchez-Mata D, 1,543 additional coauthors (online first) Protecting stable biological nomenclatural systems enables universal communication: A collective international appeal. BioScience XX: biae043. https://doi.org/10.1093/biosci/biae043 PDF
Papers (not peer-reviewed; selected)
Kakui K, Tomioka S, Yamasaki H (2014) Tanaidaceans from Rishiri Island (Crustacea: Peracarida). Rishiri Studies 33: 7–12. [in Japanese with English abstract] PDF
Kakui K (2015) First report of Zeuxo sp. (Crustacea: Tanaidacea) as prey for the forktongue goby, Chaenogobius annularis Gill, 1859. Rishiri Studies 34: 1–6. [in Japanese with English abstract and caption] PDF
Kakui K (2016) Diversity of sexual and reproductive systems in Tanaidacea. Cancer 25: 131–136. [in Japanese] PDF
Kakui K, Munakata M, Tomioka M (2021) Zeuxo ezoensis (Crustacea: Tanaidacea) from an open-air pool on Rishiri Island. Rishiri Studies 40: 21–24. [in Japanese with English abstract] PDF
Kakui K (2022) Predation of tanaidacean crustaceans by Haliclystus tenuis (Cnidaria: Staurozoa) in captivity. Bulletin of the Otaru Museum 35: 9–12. [in Japanese with English abstract] PDF
Kakui K, Munakata M (2022) The protozoan Lagenophrys sp. (Peritrichida: Sessilida: Lagenophryidae) symbiotic on Cryptocandona sp. (Ostracoda: Podocopa: Candonidae) from Hokkaido, Japan. Bulletin of the Otaru Museum 35: 13–16. [in Japanese with English abstract] PDF
Data deposited in open access repository (selected)
Kakui K, Hiruta C (2017) Tube construction by a tanaidacean Parapseudes algicola (Shiino, 1952). figshare. (https://doi.org/10.6084/m9.figshare.5373928)
Kakui K (2019) Shell exchange in the hermit-crab-like tanaidacean, Macrolabrum sp. figshare. (https://doi.org/10.6084/m9.figshare.7916288)
Kakui K (2020) Living Carpoapseudes spinigena individual in a surface core sampler. figshare. (https://doi.org/10.6084/m9.figshare.12038886.v1)
Kakui K (2021a) Snapping behavior in Dulichiella sp. (Crustacea: Peracarida: Amphipoda). figshare. (https://doi.org/10.6084/m9.figshare.14742579)
Kakui K (2021b) Feeding behavior in Haliclystus tenuis Kishinouye, 1910 (Cnidaria: Staurozoa) in captivity. figshare.
(https://doi.org/10.6084/m9.figshare.15087924)Kakui K (2022) Occurrence records of Japanese Sinelobus tanaidaceans and their published sources and online sources ver. 20220321. figshare. (https://doi.org/10.6084/m9.figshare.19561966.v1)
Kakui K, Tsuyuki A (2024) Supplementary material from "Flatworm cocoons in the abyss: same plan under pressure". figshare. (https://doi.org/10.6084/m9.figshare.c.7020979.v1)
Grants etc. (selected)
2010Apr–2012Mar Japan Society for Promotion of Science (JSPS): Grant-in-Aid (no. 10J01119 or 22·1119)
2012Apr–2014Mar Research Institute of Marine Invertebrate Foundation, Japan: Research grant
2014Apr–2015Mar Japan Science Society: Sasakawa Scientific Research Grant
2015Apr–2016Mar Fujiwara Natural History Public Interest Incorporated Foundation, Japan: Research grant
2016Apr–2019Mar Japan Society for Promotion of Science (JSPS): Grant-in-Aid for Young Scientists (B) (no. 16K18597)
2017Apr–2018Mar Akiyama life science foundation, Japan: Research grant
2018Sep–2020Aug Mikimoto Fund for Marine Ecology: Research grant
2019Apr–2024Mar Japan Society for Promotion of Science (JSPS): Grant-in-Aid for Scientific Research (C) (no. 19K06800)
2020Apr–2025Mar Japan Society for Promotion of Science (JSPS): Grant-in-Aid for Scientific Research (B) (no. 20H03313) [Co-Investigator]
2022Apr–2026Mar Japan Society for Promotion of Science (JSPS): Grant-in-Aid for Scientific Research (B) (no. 22H02681) [Co-Investigator]
Committee activities (selected)
2016Jan–2019Dec Councilor, Japanese Society of Systematic Zoology, Japan
2018Jul–2022Sep Committee member, Sapporo-branch, Zoological Society of Japan, Japan
2023May– Taxonomic editor (Tanaidacea), World Register of Marine Species (WoRMS)
Editorial activities
2016Jan–2019Dec Associate Editor, Species Diversity (Japanese Society of Systematic Zoology, Japan)
2016May–2021Apr Associate Editor, Japanese Journal of Benthology (Japanese Association of Benthology, Japan)
Reviewing Experience
Biology Letters
Cancer
CBM-Cahiers de Biologie Marine
Crustaceana
Crustacean Research
Deep Sea Research Part II
Ecology
Fauna Ryukyuana
Hydrobiologia
Japanese Journal of Benthology
Journal of Helminthology
Journal of Natural History
Journal of the Marine Biological Association of the United Kingdom
Marine Biodiversity
Marine Biology Research
PeerJ
Plankton and Benthos Research
Polish Polar Research
Progress in Oceanography
Raffles Bulletin of Zoology
Scientific Reports
Species Diversity
Systematics and Biodiversity
Zoological Journal of the Linnean Society
Zoological Science
Zoologica Scripta
Zootaxa