School personnel information




high-pressure earth science, high-pressure material science

Mail Address

Mail Address




Organization 【 display / non-display

  • 1996.05.01 - 2007.03.31, Department of Earth and Space Science, Graduate School of Science, Associate Professor

  • 2007.04.01 - , Department of Earth and Space Science, Graduate School of Science, Associate Professor

Education 【 display / non-display

Kyoto University Faculty of Engineering  Graduated 1984.03
Kyoto University Graduate School, Division of Engineering  Completed 1986.03
Osaka University Graduate School, Division of Engineering Science  Completed 1989.03
Osaka University   Graduated 1989.06

Research topics 【 display / non-display

  • Solid earth sciences-related

Academic Society Membership 【 display / non-display

  • American Ceramic Society


Academic Papers 【 display / non-display

  • HIP production of a diamond/SiC composite and application to high-pressure anvils, O. Ohtaka, M. Shimono, N. Ohnishi, H. Fukui, H. Takebe, H. Arima, T. Yamanaka, T. Kikegawa, and S. Kume, Phys. Earth Planet. Inter., 2004.04, Papers

  • High-pressure XAFS study of pure ZrO2 and stabilized cubic ZrO2, Akira Yoshiasa, Hiroshi Arima, Kei-ichiro Murai, Maki Okube, Yoshinori Katayama and Osamu Ohtaka, Journal of Physical Society of Japan,79, 2010.10, Papers

  • Ionic conductivities of CuI phases at high pressure and temperatures, Osamu Ohtaka, Yoshinori Itakura, Hiroshi Arima, Takumi Kikegawa and Akira Yoshiasa, Journal of Physical Society of Japan,79, 2010.10, Papers

  • Pressure Induced Sharp Coordination Change in Liquid Germanate, O. Ohtaka, H. Arima, H. Fukui, W. Utsumi, Y. Katayama, A. Yoshiasa, Physical Review Letters 92, 155506 (2004),92, 155506, 2004.04, Papers

  • Variable-temperature single-crystal X-ray diffraction study of SrGeO3 high-pressure perovskite phase, Akihiko Nakatsuka, Akira Yoshiasa, Keiko Fujiwara, Osamu Ohtaka, J. Mineralogical and Petrological Science,113, 280-285, (2018), 2018.09, Papers

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Books 【 display / non-display

  • Other, Dynamical Observation of the Pressure - Induced Structure Change, 2000

  • Other, Size Effects on the Quartz - Coecite Transformation Mechanism, 2000

  • Special, High Pressure Synthesis of Solids, M.Takano, Y.Takeda and O.Ohtaka, John Wiley and Sons, 1994.04

Patents / Utility models / Designs 【 display / non-display

  • Japan, simultaneous measurements of temperature and pressure using XAFS, W. Utsumi, Y. Katayama, O. Ohtaka, A. Yoshiasa, M. Okube, 特願2004-122734号(Registration), 2004.04