1969-1974 Department of. Physics, Faculty of Science, Osaka University 1974-1976 Master thesis work (Physics), Graduate School of Science, Osaka University 1976-1979 PhD thesis work (Physics), Graduate School of Science, Osaka University 1979 PhD Professional Experience: 1979 Research assistant, Okayama University of Science 1982 Lecturer, Okayama University of Science 1986 Associate Professor, Okayama University of Science 1987 Associate Professor, Institute for Study of the Earth’s Interior, Okayama University 1991 Professor, Institute for Study of the Earth’s Interior, Okayama University (1993 Feb.-Nov. Visiting Professor, Institute of Physics, University of Bern, Switzerland) 1997-present Professor, Laboratory for Earthquake Chemistry*, Graduate School of Science, University of Tokyo (* The former name "Laboratory for Earthquake Chemistry" was renamed "Geochemical Research Center" on April 2010) Awards: Award of Mass Spectrometry Society of Japan for young scientist in 1990 Award of Geochemical Society of Japan in 2007

isotope cosmo-science

Geo-and Cosmo-science based on noble gas isotopes

Nagao et al. (2011) Irradiation history of Itokawa regolith material deduced from noble gases in the Hayabusa samples. Science 333, 1128-1131. Bajo K. and Nagao K. (2011) 81Kr−Kr age and multiple cosmic-ray exposure history of the Vaca Muerta mesosiderite. Meteoritics & Planetary Science 46, 556-573. Nagao K., Kusakabe M., Yoshida Y. and Tanyileke G. (2010) Noble gases in Lakes Nyos and Monoun, Cameroon. Geochemical Journal 44, 519-543. Bartoschewitz R., Ott U., Franke L., Herrmann S., Yamamoto Y., Nagao K., Bilet M., and Grau T. (2010) Noble gas record and cosmic-ray exposure history of the new CO3 chondrite Moss−Comparison with Lancć and other CO chondrite falls. Meteoritics & Planetary Science 45, 1380-1391. Okazaki R., Takaoka N., Nagao K. and Nakamura T. (2010) Noble gases in enstatite chondrites released by stepped crushing and heating. Meteoritics and Planetary Science 45, 339-360. Misawa K., Kohno M., Tomiyama T., Noguchi T., Nakamura T., Nagao K., Mikouchi T. and Nishiizumi K. (2010) Two extraterrestrial dust horizons found in the Dome Fuji ice core, East Antarctica. Earth Planet Sci. Lett. 289, 287-297. Kotarba M. J. and Nagao K. (2008) Composition and origin of natural gases accumulated in the Polish and Ukrainian parts of the Carpathian region: gaseous hydrocarbons, noble gases, carbon dioxide and nitrogen. Chemical Geology 255, 426-438. Osawa, T., Nakamura, T. and Nagao, K. (2003) Noble gas isotopes and mineral assemblages of Antarctic micrometeorites collected at the meteorite ice field around the Yamato Mountains. Meteoritics & Planetary Sciences 38, 1627-1640. Nakamura T., Zolensky M. E., Sekiya M., Okazaki R., and Nagao K. (2003) Acid-susceptive material as a host of argon-rich noble gas in the carbonaceous chondrite Ningqiang. Meteoritics & Planetary Sciences 38, 243-250. Okazaki R., Nakamura T., Takaoka N. and Nagao K. (2003) Noble gases in ureilites released by crushing. Meteoritics & Planetary Science 38, 767-781. Honda, M., Caffee, M.W., Miura, Y.N., Nagai, H., Nagao, K. and Nishiizumi, K. (2002) Cosmogenic nuclides in the Brenham Pallasite. Meteoritics & Planetary Science. 37, 1711-1728. Osawa, T. and Nagao, K. (2002) Noble gas compositions of Antarctic micrometeorites collected at the Dme Fuji Station in 1996 and 1997. Meteoritics and Planetary Science 37, 911-936.

Okazaki, R., Takaoka, N., Nagao, K., Sekiya, M. and Nakamura, T. (2001) Noble-gas-rich chondrules in an enstatite meteorite. Nature 412, 795-798.