Yasuhito Sekine / Lecturer / Division of Transdisciplinary Sciences
Department of Complexity Science and Engineering / / Earth and Planetary Sciences

Career Summary
2001: B.Sc., Department of Earth and Planetary Physics, University of Tokyo
2006: Ph.D., Department of Earth and Planetary Science, University of Tokyo
2006-2007: Research Associate, Department of Earth and Planetary Science, University of Tokyo
2007-2011: Faculty Research Associate, Department of Complexity Science and Engineering, University of Tokyo
2011-present: Lecturer, Department of Complexity Science and Engineering, University of Tokyo
Educational Activities
Graduate School: TBD
Undergraduate School: Frontiers of Planetary Sciences
Research Activities
My major research interest is to understand how planets and satellites evolved atmospheres and oceans that are capable of supporting life. In particular, I am interested in the following topics:
1) The origin and evolution of planetary and satellite atmospheres, including the Earth, Mars, and Titan.
2) Chemical evolution in solar nebula and planetary atmospheres.
3) Hypervelocity impact of asteroids and comets on planets and its role in the evolution of atmospheres and life.
4) Geochemical and geological analyses of ancient sedimentary rocks to understand what caused the rise in atmospheric oxygen in Earthfs atmosphere (a.k.a., the Great Oxidation Event)
1) Y. Sekine, H. Genda, S. Sugita, T. Kadono, and T. Matsui, Replacement and late formation of atmospheric N2 on undifferentiated Titan by impacts, Nature Geoscience, 4, 359-362, 2011.
2) Y. Sekine, K. Suzuki, R. Senda, K.T. Goto, E. Tajika, R. Tada, K. Goto, S. Yamamoto, N. Ohkouchi, N.O. Ogawa, and T. Maruoka, Osmium evidence for synchronicity between a rise of atmospheric oxygen and Palaeoproterozoic deglaciation, Nature Communications, 2, doi: 10.1038/ncomms1507, 2011.
3) Y. Sekine, H. Imanaka, T. Matsui, B.N. Khare, E.L.O. Bakes, C.P. McKay, and S. Sugita, The role of organic haze in Titan's atmosphere I: Laboratory investigation on heterogeneous reaction of atomic hydrogen with Titan tholin, Icarus, 194, 186-200, 2008.
4) Y. Sekine, S. Sugita, T. Shido, T. Yamamoto, Y. Iwasawa, T. Kadono, and T. Matsui, The role of Fischer-Tropsch catalysis in the origin of methane-rich Titan, Icarus, 178, 154-164, 2005.
5) Y. Sekine, Planetary chemistry: Toward understanding the origin and variety of planetary environments, Planetary People, 19, 303-313, 2010 (in Japanese).
Other Activities
A member of the Japan Geoscience Union, the Geochemical Society of Japan, the Japanese Society for Planetary Sciences, and the American Geophysical Union.
Future Plan
1) Development of devices in the future space exploration devices to assist with the study of chemistry and biology in the solar system.
2) Interdisciplinary approaches in geology, planetary sciences, astronomy, and biology to study the habitability of life in our solar system and beyond.
Messages to Students
I welcome students who are interested in the origin and evolution of both planets and satellites in our solar system and beyond. All you need is patience, stamina, mental strength, and, most importantly, curiosity.