Publications

Journal publications

Peer reviewed journal

[77] Liqiang Zhao, Kotaro Shirai, Naoko Murakami-Sugihara, Kiyoshi Tanaka (in press) Carbon isotopic analysis of mussel periostracum and its implications for the decipherment of coastal carbon source. Geochimica et Cosmochimica Acta.

[76] Naoko Murakami-Sugihara, Kotaro Shirai, Masako Hori, Yosuke Amano, Hideki Fukuda, Hajime Obata, Kiyoshi Tanaka, Kaoruko Mizukawa, Yuji Sano, Hideshige Takada, Hiroshi Ogawa (in press) Mussel shell geochemical analyses reflect coastal environmental changes following the 2011 Tohoku tsunami. Earth and Space Chemistry

[75] Dung Quang Le, Siau Yin Fui, Rumeaida Mat Piah, Toyoho Ishimura, Yuji Sano, Kentaro Tanaka, Kotaro Shirai (2019) Isotopic evidences of connectivity between the inshore vegetated lagoon as nursery habitat and coastal artificial reefs as adult habitats for the reef fish, Lethrinus lentjan, from East coast of Peninsular, Malaysia. Marine and Freshwater Research.

[74] Liqiang Zhao, Kotaro Shirai, Hirofumi Tazoe, Naoko Murakami-Sugihara, Kaoru Kubota, Kentaro Tanaka, Tsuyoshi Iizuka (in press) Determination of the geographical origin of marine mussels (Mytilus spp.) using 143Nd/144Nd ratios. Marine Environmental Research, 148, 12-18

[73] Wataru Fujiya, Peter Hoppe, Takayuki Ushikubo, Kohei Fukuda, Paula Lindgren, Martin R. Lee, Mizuho Koike, Kotaro Shirai, Yuji Sano (2019) Migration of D-type asteroids from the outer Solar System inferred from carbonate in meteorites. Nature Astronomy

[72] Koji Seike, Shinji Sassa, Kotaro Shirai, Kaoru Kubota (2019). Fate of benthic invertebrates during seabed liquefaction: Quantitative comparison of living organism body density with liquefied substrate density. Estuarine, Coastal and Shelf Science, 223, 1-5.

[71] Liqiang Zhao, Kotaro Shirai, Naoko Murakami-Sugihara, Tomihiko Higuchi, Takashi T. Sakamoto, Toshihiro Miyajima, Kiyoshi Tanaka (2019) Retrospective monitoring of salinity in coastal waters with mussel shells, Science of The Total Environment, 671, 666-675, https://doi.org/10.1016/j.scitotenv.2019.03.405

[70] Tsuguo Otake, Yosuke Amano, Kotaro Shirai, Noritaka Mochioka, Toshiro Takahashi, Seinen Chow, Hiroaki Kurogi, Dou Shouzeng, Asuka Yamaguchi, Katsumi Tsukamoto (2019) Evaluation from otolith Sr stable isotope ratios of possible juvenile growth areas of Japanese eels collected from the West Mariana Ridge spawning area. Fisheries Science, 85, 483-493

[69] Teresa Escobar Ma, Naoto Takahata, Takanori Kagoshima, Kotaro Shirai, Kentaro Tanaka, Jin Oh Park, Hajime Obata, Yuji Sano (2019) Assessment of helium isotopes near Japan Trench five years after the 2011 Tohoku-Oki earthquake. Earth and Space Chemistry, 3, 581-587

[68] Taro Yoshimura, Kotaro Shirai, Naoko Murakami-Sugihara, Saburo Sakai, Takenori Sasaki (2019) Sexual dimorphism in shell growth of the oviparous boreal scallop Swiftopecten swiftii (Bivalvia: Pectinidae), 85, 253-261

[67] Eric O. Walliser, Kazushige Tanabe, Yoshinori Hikida, Kotaro Shirai, and Bernd R. Schöne (2019) Sclerochronological study of the gigantic inoceramids Sphenoceramus schmidti and S. sachalinensis from Hokkaido, northern Japan. Lethaia

[66] Lin Cheng, Claire Normandeau, Roxane Bowden, Richard Doucett, Barbora Callagher, David Gillikin, Yuichiro Kumamoto, Jennifer McKay, Paul Middlestead, Ulysses Ninnemann, Daniel Nothaft, Elena Dubinina, Paul Quay, Gilles Reverdin, Kotaro Shirai, Pål Tore Mørkved, Bethany P. Theiling, Robert van Geldern, Doug W.R. Wallace (2019) An international inter-comparison of stable carbon isotope composition measurements of dissolved inorganic carbon in seawater. Limnology and Oceanography: Methods, 17, 200-209

[65] Douglas Lan, Yuji Sano, Takuya Yahagi, Kentaro Tanaka, Kotaro Shirai, Yusuke Sawaki, Takeshi Ohno, Mariko Abe, Hongwei Yang, Hai Liu, Tao Jiang, Teng Wang (in press) An integrated chemostratigraphic (δ13Ccar, δ18O-87Sr/86Sr) study of the Doushantuo Formation in western Hubei Province, South China. Precambrian Research, 320, 232-252.

[64] Kentaro Tanaka, Nobuyuki Okaniwa, Tsuzumi Miyaji, Naoko Murakami-Sugihara, Liqiang Zhao, Kazushige Tanabe, Bernd R. Schöne, Kotaro Shirai (in press) Microscale magnesium distribution in shell of the Mediterranean mussel Mytilus galloprovincialis: An example of multiple factors controlling Mg/Ca in biogenic calcite. Chemical Geology, 511, 521-532, https://doi.org/10.1016/j.chemgeo.2018.10.025

[63] Tatsuya Sakamoto, Kosei Komatsu, Kotaro Shirai, Tomihiko Higuchi, Toyoho Ishimura, Takashi Setou, Yasuhiro Kamimura, Chikako Watanabe, Atsushi Kawabata (in press) Combining micro-volume isotope analysis and numerical simulation to reproduce fish migration history. Methods in Ecology and Evolution, 10, 59-69, https://doi.org/10.1111/2041-210X.13098

[62] Masaya Toyokawa, Kotaro Shirai, Naoto Takahata, Akizumi Ishida, Yuji Sano (in press) Visualization of statolith growth in Aurelia aurita sensu lato labeled in 34S- and Sr-enriched seawater by using NanoSIMS and EPMA. Journal of Plankton Research, 40, 619-626.

[61] Hikaru Itakura, Kohma Arai, Kenzo Kaifu, Kotaro Shirai, Akihito Yoneta, Yoichi Miyake, David H Secor, Shingo Kimura (in press) Distribution of wild and stocked Japanese eels in the Tone River watershed revealed by otolith stable isotopic ratios. Journal of Fish Biology, 93, 805-813,

[60] Moe Kato, Oji Tatsuji, Kotaro Shirai (2018) Reply to comment on Kato et al. (2017) ‘‘Paleoecology of echinoderms in cold seep environments revealed by isotope analysis in the late cretaceous western interior seaway”. Palaios, 33, 284-285.

[59] Kenzo Kaifu, Kazuki Yokouchi, Tomihiko Higuchi, Hikaru Itakura, Kotaro Shirai (in press) Depletion of naturally recruited wild Japanese eels in Okayama, Japan, revealed by otolith stable isotope ratios and abundance indices. Fisheries Science

[58] Yosuke Amano, Masayuki Kuwahara, Toshiro Takahashi, Kotaro Shirai, Kodai Yamane, Tatsuya Kawakami, Kazuki Yokouchi, Hiroshi Amakawa, and Tsuguo Otake (in press) Low-fidelity homing behaviour of Biwa salmon (Oncorhynchus sp.) landlocked in Lake Biwa as inferred from otolith elemental and Sr isotopic compositions. Fisheries Sicence

[57] Jen-Chieh Shiao, Kotaro Shirai, Kentaro Tanaka, Naoto Takahata, Yuji Sano, Sung-Yun Hsiao, Der-Chuen Lee, Yung-Che Tseng (in press) Assimilation of nitrogen and carbon isotopes from fish diets to otoliths as measured by nanoscale secondary ion mass spectrometry. Rapid Communication in Mass Spectrometry.

[56] Taro Komagoe, Tsuyoshi Watanabe, Kotaro Shirai, Atsuko Yamazaki, Mitsuo Uematu (in press) Geochemical and microstructural signals in giant clam Tridacna maxima recorded typhoon events at Okinotori Island, Japan. Journal of Geophysical Research-Biogeosciences

[55] Kaoru Kubota, Kotaro Shirai, Naoko Murakami-Sugihara, Koji Seike, Masayo Minami, Toshio Nakamura, Kazushige Tanabe (in press) Bomb-14C Peak in the North Pacific Recorded in Long-lived Bivalve Shells (Mercenaria stimpsoni). Journal of Geophysical Research-Ocean.

[54] Quang Dung Le, Satyanarayana Behara, Siau Yin Fui, Kotaro Shirai (in press) Mercury bioaccumulation in tropical mangrove wetland fishes: evaluating potential risk to coastal wildlife. Biological Trace Element Research

[53] Kotaro Shirai, Tsuguo Otake, Yosuke Amano, Mari Kuroki, Takayuki Ushikubo, Noriko T. Kita, Masafumi Murayama, Katsumi Tsukamoto, John W. Valley (in press) Temperature and depth distribution of Japanese eel eggs estimated using otolith oxygen stable isotopes. Geochimica et Cosmochimica Acta

[52] Quang Dung Le, Kentaro Tanaka, Yii Siang Hii, Yuji Sano, Kusuto Nanjo, Kotaro Shirai (in press) Importance of seagrass-mangrove continuum as feeding grounds for juvenile pink ear emperor Lethrinus lentjan in Setiu Lagoon, Malaysia: Stable isotope approach. Journal of Sea Research

[51] Kotaro Shirai, Futa Koyama, Naoko Murakami-Sugihara, Kusuto Nanjo, Tomihiko Higuchi, Hiroyoshi Kohno, Yoshiro Watanabe, Ken Okamoto, Mitsuhiko Sano (in press) Reconstruction of the salinity history associated with migration of mangrove fishes using otolith oxygen isotopic analysis. Marine Ecology Progress Series

[50] Koji Seike, Shinji Sassa, Kotaro Shirai, Kaoru Kubota (in press) Lasting impact of a tsunami event on sediment-organism interactions in the ocean. Journal of Geophysical Research-Ocean

[49] Masako Hori, Kotaro Shirai, Katsunori Kimoto, Atsushi Kurasawa, Haruka Takagi, Akizumi Ishida, Naoto Takahata, Yuji Sano (in press) Chamber formation and Mg distribution in the calcite walls of planktonic foraminifera (Globigerina bulloides and Globigerinoides ruber) through laboratory culture. Marine Micropaleontology.

[48] Naoto Takahata, Kotaro Shirai, Kazuto Ohmori, Hajime Obata, Toshitaka Gamo Yuji Sano (2018) Distribution of helium-3 plumes and deep-sea circulation in the central Indian Ocean. Terrestrial, Atmospheric and Oceanic Sciences, 29, 1-10

[47] Kotaro Shirai, Kaoru Kubota, Naoko Murakami-Sugihara, Koji Seike, Masataka Hakozaki, Kazushige Tanabe (2018) Stimpson's hard clam Mercenaria stimpsoni, a multi-decadal climate recorder for the northwest Pacific coast. Marine Environmental Research, 133, 49-56.

[46] Tomihiko Higuchi, Kotaro Shirai, Takuma Mezaki, Ikuko Yuyama (2017) Temperature dependence of aragonite and calcite skeleton formation by a scleractinian coral in low-Mg/Ca seawater. Geology, 45 (12), 1087-1090 doi.org/10.1130/G39516.1

[45] Kazushige Tanabe, Toshihiro Mimura, Tsuzumi Miyaji, Kotaro Shirai, Kaoru Kubota, Naoko Murakami-Sugihara, Bernd R. Schöne (2017) Interannual to decadal variability of summer sea surface temperature in the Sea of Okhotsk recorded in the shell growth history of Stimpson’s hard clams (Mercenaria stimpsoni). Global and Planetary Change, 157, 35-47

[44] Le Quang Dung, Kentaro Tanaka, Luu Viet Dung, Siau Yin Fui, Liam Lachs, Siti TafzilMeriam Sheikh Abdul Kadir, Yuji Sano, Kotaro Shirai (2017) Biomagnification of total mercury in the mangrove lagoon foodweb in east coast of Peninsula, Malaysia. Regional Studies in Marine Science, 16, 49-55

[43] Oluwatoosin B.A. Agbaje, Richard Wirth, Luiz F.G. Morales, Kotaro Shirai, Matthew Kosnik, Tsuyoshi Watanabe, Dorrit E. Jacob (2017) Architecture of crossed-lamellar bivalve shells: The Southern Giant Clam (Tridacna derasa, Röding, 1798). Royal Society Open Science, 4, 170622

[42] Kenzo Kaifu, Hikaru Itakura, Yosuke Amano, Kotaro Shirai, Kazuki Yokouchi, Ryoshiro Wakiya, Naoko Murakami-Sugihara, Izumi Washitani, Takashi Yada (i2017) Discrimination of wild and cultured Japanese eels based on otolith stable isotope ratios. ICES Journal of Marine Science, doi:10.1093/icesjms/fsx173

[41] Koji Seike, Kotaro Shirai, Naoko Murakami-Sugihara (2017) Using tsunami deposits to determine the maximum depth of benthic burrowing. PLOS ONE. 12 (8) e0182753, DOI:10.1371/journal.pone.0182753

[40] Kaoru Kubota, Kotaro Shirai, Tomihiko Higuchi, Toshihiro Miyajima (in press) Oxygen and hydrogen isotope characteristics of seawater in Otsuchi Bay and meteoric water of inflowing rivers. Coastal Marine Science

[39] Tatsuya Sakamoto, Kosei Komatsu, Michio Yoneda, Toyoho Ishimura, Tomihiko Higuchi, Kotaro Shirai, Yasuhiro Kamimura, Chikako Watanabe, Atsushi Kawabata (2017) Temperature dependence of δ18O in otolith of juvenile Japanese sardine: laboratory rearing experiment with micro-scale analysis, Fisheries Research, 194, 55-59

[38] Christoph S. Füllenbach, Bernd R. Schöne, Kotaro Shirai, Naoto Takahata, Akizumi Ishida, Yuji Sano (2017) Minute co-variations of Sr/Ca ratios and microstructures in the aragonitic shell of Cerastoderma edule (Bivalvia) – Are geochemical variations at the ultra-scale masking potential environmental signals? Geochimica et Cosmochimica Acta, 205, 256-271.38

[37] Kaoruko Mizukawa, Yasuko Hirai, Hiroyuki Sakakibara, Satoshi Endo, Keiji Okuda, Hideshige Takada, Naoko Murakami-Sugihara, Kotaro Shirai, Hiroshi Ogawa (2017) Spatial distribution and temporal trend of anthropogenic organic compounds derived from the 2011 East Japan Earthquake. Archives of Environmental Contamination and Toxicology, DOI 10.1007/s00244-017-0389-6

[36] Moe Kato, Tatsuo Oji, Kotaro Shirai (2017) Paleoecology of echinoderms in cold seep environments revealed by isotope analysis in the late Cretaceous Western Interior Seaway. Palaios, 32, 218-230

[35] Le Quang Dung, Nurhanan Atiq Haron, Kentaro Tanaka, Akizumi Ishida, Luu Viet Dung, Kotaro Shirai (2017) Quantitative contribution of primary food sources for a mangrove food web in Setiu lagoon from East coast of Peninsular Malaysia, stable isotopic (δ13C and δ15N) approach. Regional Studies in Marine Science, 9, 174-179

[34] Kaoru Kubota, Kotaro Shirai, Naoko Murakami-Sugihara, Koji Seike, Masako Hori, Kazushige Tanabe (2017) Annual shell growth pattern of the Stimpson's hard clam Mercenaria stimpsoni as revealed by sclerochronological and oxygen stable isotope measurements.Palaeogeography, Palaeoclimatology, Palaeoecology, 465, 307-315

[33] Hsinyi Wen, Yuji Sano, Naoto Takahata, Yama Tomonaga, Akizumi Ishida, Kentaro Tanaka, Takanori Kagoshima, Kotaro Shirai, Jun-ichiro Ishibashi, Hisayoshi Yokose, Urumu Tsunogai, Tsanyao Yang (2016) Helium and methane isotopic compositions and fluxes of shallow submarine hydrothermal plumes near the Tokara Islands, southern Japan. Scientific Reports, 6:34126, doi: 10.1038/srep34126

[32] Noriko Nakayama, Kotaro Shirai, Yuji Sano, Toshitaka Gamo, Hajime Obata (2015) Sulfides in oxic seawater over the submarine hydrothermal area of Kikai Caldera south of Kyushu Island, Japan. Geochemical Journal, 49, e1-e7, doi:10.2343/geochemj.2.0374

[31] Wataru Fujiya, Naoji Suigura, Yves Marrocchi, Naoto Takahata, Peter Hoppe, Kotaro Shirai, Yuji Sano, Hajime Hiyagon (2015) Comprehensive study of carbon and oxygen isotope compositions, trace element abundances and cathodoluminescence intensities of calcite in the Murchison CM chondrite. Geochimica et Cosmochimica Acta, 161, 101-117, doi:10.1016/j.gca.2015.04.010

[30] Masako Hori, Yuji Sano, Akizumi Ishida, Naoto Takahata, Kotaro Shirai, Tsuyoshi Watanabe (2015) Middle Holocene daily light cycle reconstructed from the strontium/calcium ratios of a fossil giant clam shell. Scientific Reports, 5, 8734, doi:10.1038/srep08734

[29] Yuji Sano, Kosaku Toyoshima, Akizumi Ishida, Kotaro Shirai, Naoto Takahata, Tomohiko Sato, Tsuyoshi Komiya (2014) Ion microprobe U–Pb dating and Sr isotope measurement of a protoconodont. Journal of Asian Earth Sciences, 92, 10-17, doi: 10.1016/j.jseaes.2014.05.024

[28] Kazuto Ohmori, Tsuyoshi Watanabe, Masaharu Tanimizu, Kotaro Shirai (2014) Lead concentration and isotopic composition in the Pacific sclerosponge (Acanthochaetetes wellsi) reflects environmental lead pollution. Geology, 42, 287-290, doi: 10.1130/G34316.1

[27] Kotaro Shirai, Bernd R. Schöne, Tsuzumi Miyaji, Pascal Radarmacher, Richard A. Krause Jr., Kazushige Tanabe (in press) Assessment of the mechanism of elemental incorporation into bivalve shells (Arctica islandica) based on elemental distribution at the microstructural scale. Geochimica et Cosmochimica Acta,

[26] Yosuke Amano, Masayuki Kuwahara, Toshiro Takahashi, Kotaro Shirai, Kodai Yamane, Hiroshi Amakawa, Tsuguo Otake (2013) Otolith elemental and isotopic composition as a natal tag for Biwa salmon Oncorhynchus masou subsp. in Lake Biwa. Aquatic Biology, 19, 85-95.

[25] Koji Seike, Kotaro Shirai, Yukihisa Kogure (2013) Disturbance of Shallow Marine Soft-Bottom Environments and Megabenthos Assemblages by a Huge Tsunami Induced by the 2011 M9.0 Tohoku-Oki Earthquake. PLOS ONE, 8, e65417. doi:10.1371/journal.pone.0065417

[24] Takashi Kitagawa, Toyoho Ishimura, Rena Uozato, Kotaro Shirai, Yosuke Amano, Akira Shinoda, Tsuguo Otake, Urumu Tsunogai, Shingo Kimura (2013) Validity of otolith δ18O of Pacific bluefin tuna (Thunnus orientalis) as an indicator of ambient water temperature. Marine Ecology Progress Series, 481, 199-209

[23] Shuo-Zeng Dou, Yosuke Amano, Xin Yu, Liang Cao, Kotaro Shirai, Tsuguo Otake, Katsumi Tsukamoto (2012) Elemental signature in otolith nuclei for stock discrimination of anadromous tapertail anchovy (Coilia nasus) using laser ablation ICPMS. Environmental Biology of Fishes, 95, 431-443

[22] Kotaro Shirai, Kohki Sowa, Tsuyoshi Watanabe, Yuj Sano, Takashi Nakamura, Peta Clode (2012) Visualization of sub-daily skeletal growth patterns in massive Porites corals grown in Sr-enriched seawater. Journal of Structural Biology, 180, 47-56 Abstract 日本語要旨

[21] Yuji Sano, Sayumi Kobayashi, Kotaro Shirai, Naoto Takahata, Matsumoto Katsumi, Tsuyoshi Watanabe, Kohki Sowa, Kenji Iwai (2012) Past daily light cycle recorded in the strontium/ calcium ratios of giant clam shells. Nature Communications, 3, doi: 10.1038/ncomms1763

[20] Kodai Yamane, Kotaro Shirai, Yoshitomo Nagakura, Tsuguo Otake (2012) Assessing the usefulness of otolith elemental compositions for evaluating the population structure of the Pacific herring Clupea pallasii in northern Japan. Fisheries Science 78, 295-307

[19] Atsuko Yamazaki, Tsuyoshi Watanabe, Nanako O. Ogawa, Naohiko Ohkouchi, Kotaro Shirai, Mitsuhiro Toratani, Mitsuo Uematsu (2011) Seasonal variations in the nitrogen isotope composition of Okinotori coral in the tropical Western Pacific: A new proxy for marine nitrate dynamics. Journal of Geophysical Research -Biogeosciences, 116, doi:10.1029/2011JG001697

[18] Kazuki Yokouchi, Nobuto Fukuda, Kotaro Shirai, Jun Aoyama, Francoise Daverat, Katsumi Tsukamoto (2011) Time lag of the response on the otolith strontium/calcium ratios of Japanese eel, Anguilla japonica to changes in strontium/calcium ratios of ambient water. Environmental Biology of Fishes, 92, 469-478

[17] Shinsuke Kawagucci, Kotaro Shirai, Tefang F. Lan, Naoto Takahata, Urumu Tsunogai, Yuji Sano, Toshitaka Gamo (2010) Gas geochemical characteristics of hydrothermal plumes at the HAKUREI and JADE vent sites, the Izena Cauldron, the Okinawa Trough. Geochemical Journal, 44, 507-518

[16] Naoto Takahata, Taichi Tokukake, Yuji Sano, Kotaro Shirai, Shinzou Fujio, Kiyoshi Tanaka (2010) Helium Isotopes of Seawater in the Philippine Sea and the western North Pacific. Geochemical Journal, 44, 451-460

[15] Kodai Yamane, Kotaro Shirai, Yoshitomo Nagakura, Motohito Yamaguchi, Akio Takita, Takashi Horii, Nobuyuki Tanaka, Sachinobu Yamane, Takaomi Arai, Tsuguo Otake (2010) Spatial variation in otolith elemental composition of the Pacific herring Clupea pallasii in northern Japan. Aquatic Biology, 10, 283-290

[14] Tefang F. Lan, Tsanyao F. Yang, Naoto Takahata, Kotaro Shirai, Daniele L. Pinti, Yuji Sano (2010) Evaluating Earth degassing in subduction zones by measuring helium fluxes from the ocean floor. Earth and Planetary Science Letters, 298, 317-322

[13]Larissa F Dobrzhinetskaya, Harry W Green II, Naoto Takahata, Yuji Sano, Kotaro Shirai (2010) Crustal Signature of δ¹³C and Nitrogen Content in Microdiamonds from Erzgebirge, Germany: Ion Microprobe Studies. Journal of Earth Science, 21, 623-634

[12] Dung Quang Le, Naoko Chino, Kotaro Shirai and Takaomi Arai (2010) Trace metals in Japanese eel Anguilla japonica in relation to ecological migratory types and growth stages. Estuarine, Coastal and Shelf Science, 87, 405-410

[11] Dung Le Quang, Kotaro Shirai, Nguyen Duc Cu, Nobuyuki Miyazaki, Takaomi Arai, (2009) Heavy metals in a tropical eel Anguilla marmorata from the central part of Vietnam. Water Air and Soil Pollution, 204, 69-78

[10] Kotaro Shirai, Tatsunori Kawashima, Kohki Sowa, Tsuyoshi Watanabe, Toru Nakamori, Naoto Takahata, Hiroshi Amakawa, Yuji Sano, (2008) Minor and trace element incorporation into branching coral Acropora nobilis skeleton. Geochimica et Cosmochimica Acta, 72, 5386-5400,

[9] Kotaro Shirai, Naoto Takahata, Hiroyuki Yamamoto, Tamano Omata, Takenori Sasaki, Yuji Sano, (2008) Novel analytical approach to bivalve shell biogeochemistry: a case study of hydrothermal mussel shell. Geochemical Journal, 42, 413-420

[8] Yuji Sano, Kotaro Shirai, Naoto Takahata, Hiroshi Amakawa, Tsuguo Otake, (2008) Ion microprobe Sr isotope analysis of carbonates with about five micrometer spatial resolution: an example from a sweetfish otolith. Applied Geochemistry, 23, 2406 - 2413

[7] Asami Uchida, Manabu Nishizawa, Kotaro Shirai, Hiroko Iijima, Hajime Kayanne, Naoto Takahata, Yuji Sano, (2008) High sensitivity measurements of nitrogen isotopic ratios in coral skeletons from Palau, western Pacific: temporal resolution and seasonal variation of nitrogen sources. Geochemical Journal, 42, 255-262

[6] Naoto Takahata, Yuji Sano, Keika Horiguchi, Kotaro Shirai, Toshitaka Gamo, (2008) Helium isotopes of seawater in the Japan Sea. Journal of Oceanography, 64, 293-301

[5] Daisuke KUNIOKA, Kotaro SHIRAI, Naoto TAKAHATA, Takashi TOYOFUKU, Yurika Ujiie, and Yuji SANO,(2006) The micro-distribution of Mg/Ca, Sr/Ca, and Ba/Ca ratios in Pulleniatina obliquiloculata test by using a Nano-SIMS; Implication for the vital effect mechanism. Geophysics Geochemistry Geosystems., 7, Q12P20, doi:10.1029/2006GC001280

[4] Kotaro SHIRAI, Minoru KUSAKABE, Shunichi NAKAI, Teruaki ISHII, Tsuyoshi WATANABE, Hajime HIYAGON, and Yuji SANO, (2005) Deep-sea coral geochemistry: Implication for the vital effect. Chemical Geology, 224, 212-222

[3] Yuji SANO, Kotaro SHIRAI, Naoto TAKAHATA, Takafumi HIRATA, Neil C. STURCHIO, (2005) Nano-SIMS analysis of Mg, Sr, Ba and U in natural calcium carbonate. Analytical Science, 21, 1091-1097

[2] Naoto TAKAHATA, Meetu AGARWAL, Manabu NISHIZAWA, Kotaro SHIRAI, Yumiko INOUE, Yuji SANO, (2005) Helium-3 plume over the East Pacific Rise at 25S. Geophysical Research Letters, 32 L11608, doi:10.1029/2005GL2307

[1] Naoto TAKAHATA, Tsuyoshi WATANABE, Kotaro SHIRAI, Manabu NISHIZAWA and Yuji SANO, (2004) Helium isotopes of seawater in adjacent sea of Nansei Islands, Southewest Japan. Geochemical Journal, 38, 593-600

Textbook chapter

Yosuke Amano, Jen-Chieh Shiao, Toyoho Ishimura, Kazuki Yokouchi, Kotaro Shirai (2015) Otolith geochemical analysis for stock discrimination and migratory ecology of tunas. In “Biology and ecology of Bluefin tuna” (Takashi Kitagawa and Shingo Kimura, eds.) Science Publishers

Invited talks

Kotaro Shirai, Tsuguo Otake, Mari Kuroki, Takayuki Ushikubo, Noriko T. Kita, Yosuke Amano, Katsumi Tsukamoto, John W. Valley (2010, June) Eel larvae may hatch in the surface layer near the West Mariana Ridge: Ion microprobe d¹⁸O analysis with 7 um spatial resolution in glass eel otoliths.

Annual Goldschmidt Conference, Knoxville, USA

(Invited speaker, Session: High Precision and High Resolution SIMS Analyses: New Application to Earth and Planetary Science)

Presentations: international conference

Kotaro Shirai, Pascal Radermacher, Bernd R. Schöne (2010 July) Micro scale elemental discribution in shells of Arctica islandica.

2nd International Screlochronology Conference, Mainz, Germany

Kotaro Shirai, Kodai Yamane, Yosuke Amano, Takaomi Arai, Tsuguo Otake (2009, August) Assessing the usefulness of pressed powder pellet standard prepared from three biogenic calcium carbonate certified reference material for improving the accuracy of otolith chemistry using LA-ICP-MS

4th International Otolith Symposium, Monterey, USA

Kotaro Shirai, Azumi Kuroyanagi, Yuji Sano (2008, July) Micro scale elemental distribution in planktonic foraminifera tests: effect of different biology.

Annual Goldschmidt Conference, Vancouver, Canada

Kotaro Shirai, Naoto Takahata, Hiroshi Amakawa, Tsuyoshi Watanabe, Tatsunori Kawashima, Kohki Sowa, Yuji Sano, (2007 Aug.) Minor and trace element geochemistry of a branching coral Acropora sp skeleton.

Annual Goldschmidt Conference, Cologne, Germany

Kotaro Shirai, Tsuyoshi Watanabe, Naoto Takahata, Yuji Sano, (2006 Sep.) Elemental fractionation in biogenic calcium carbonate.

Annual Goldschmidt Conference, Melbourne, Australia

Kotaro Shirai, Minoru Kusakabe, Hajime Hiyagon, Shunichi Nakai, Yuji Sano, (2004 Jun.) Deep-sea coral geochemistry: potential proxy for paleoclimate reconstruction.

10th International Coral Reef Symposium, Okinawa, Japan