Research areas	Paleontology, Geochemistry
Keywords	micropaleontology, foraminifera, stable isotope, otolith, development of analytical system
Themes	Isotope geochemistry with ultra-sensitive determination for the stable carbon and oxygen isotopic compositions of the minute amount of carbonate. Geochemistry specialized with development the automated analytical systems. Geology and micropaleontology, specialized with environmental reconstruction, taxonomy of foraminifera and biostratigraphy. Applications of the ultra-high resolution stable isotopic analytical technique for clarifying the life history recorded in fish otolith.
Major publications	Nakamura, M., Yoneda, M., Ishimura, T., Shirai, K., Tamamura, M. and Nishida, K., Temperature dependency equation for chub mackerel (Scomber japonicus) identified by a laboratory rearing experiment and microscale analysis. Marine and Freshwater Research. Ujiie, U., Kimoto, K., Ishimura, T. Advanced approach to analyzing calcareous protists for present and past pelagic ecology: comprehensive analysis of 3D-morphology, stable isotopes, and genes of planktic foraminifers. PLoS ONE. DOI: 10.1371/journal.pone.0213282 2019年3月 Sakamoto, T., Komatsu, K., Shirai, K., Higuchi, T., Ishimura, T., Setou, T., Kamimura, Y., Watanabe, C., and Kawabata, A. Combining micro-volume isotope analysis and numerical simulation to reproduce fish migration history. Methods in Ecology and Evolution. DOI: 10.1111/2041-210X.13098 伊藤進一・船本鉄一郎・志田修・上村泰洋・高橋素光・白井厚太朗・樋口富彦・小松幸生・横井孝暁・坂本達也・Guo Chen-ying・石村豊穂. 気候変動が水産資源の変動に与える影響を理解する上での問題点と今後の展望. 海の研究 2(71) 59-73 2018年1月 Nishida, K. and Ishimura, T. Grain-scale stable carbon and oxygen isotopic variations of the international reference calcite, IAEA-603. Rapid Communications in Mass Spectrometry 2017年9月 Sakamoto, T., Komatsu, K., Yoneda, M., Ishimura, T., Higuchi, T., Shirai, K., Kamimura, Y., Watanabe, C., Kawabata, A. Temperature dependence of d18O in otolith of juvenile Japanese sardine: laboratory rearing experiment with micro-scale analysis. Fisheries Research Takagi, H., Moriya, K., Ishimura, T., Suzuki, A., Kawahata, H., and Hirano, H., 2016. Individual migration pathways of modern planktic foraminifers: Chamber-by-chamber assessment of stable isotopes. Paleontological Research, doi:10.2517/2015PR036. Kitagawa, T., Ishimura, T., Uozato, R., Shirai, K., Amano, H., Shinoda, A., Tsunogai, U., and Kimura, S. 2013. Validity of otolith δ18O of Pacific bluefin tuna (Thunnus orientalis) as an indicator for ambient environment. Marine Ecology Progress Series. 481. 199–209. doi: 10.3354/meps10202 Ishimura, T., Tsunogai, U., Hasegawa, S., Nakagawa, F., Oi, T., Kitazato, H., Suga, H., Toyofuku, T. 2012. Variation in stable carbon and oxygen isotopes of individual benthic foraminifera: tracers for quantifying the magnitude of isotopic disequilibrium. Biogeosciences. 9, 4353-4367, doi:10.5194/bg-9-4353-2012 Ishimura, T. Tsunogai, U., Nakagawa, F. 2008. Grain-scale heterogeneity of the stable carbon and oxygen isotopic compositions in international standard calcite materials (NBS19, NBS18, IAEA-CO-1, and IAEA-CO-8). Rapid Communications in Mass Spectrometry. 22, 1925–1932. DOI: 10.1002/rcm.3571 Ishimura, T., Tsunogai, U., and Gamo, T., Stable carbon and oxygen isotopic determination of sub-microgram quantities of CaCO3 to analyze individual foraminiferal shells. Rapid Communications in Mass Spectrometry. 18. pp 2883-2888. DOI: 10.1002/rcm.1701. 2004.
Professional societies/Research and synergic activities	Cushman Foundation American Geophysical Union Paleosciences Society PALAEONTOLOGICAL SOCIETY OF JAPAN JAPAN GEOSCIENCE UNION GEOCHEMICAL SOCIETY OF JAPAN THE GEOLOGICAL SOCIETY OF JAPAN
Teaching Areas	Undergraduate courses Graduate courses (Master's program) Graduate courses (Doctor's program) Undergraduate courses open to all departments
Background	Associate Professor, Kyoto University (2020- present) Associate Professor, National Institute of Technology, Ibaraki College (2012- 2020) Visiting Scientist (AIST, 2012- present) Visiting Scientist (JAMSTEC, 2012-2014) Post-Doctoral Research Fellow (April 2012 -2012). Creative Research Institution, Hokkaido University, Post-Doctoral Research Fellow (April 2009 -2012). Geological Survey of Japan, AIST Post-Doctoral Research Fellow (April 2005 - March 2009) Graduate School of Sciences, Hokkaido University, Research scientist, Nakagawa Museum of Natural History, April 1999 - March 2000. Ph.D. (Earth Science), Hokkaido University, 2005 Master of Science (Environmental Science), Hokkaido University, 1999 Bachelor of Science (Geology)., Hokkaido University, 1997

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