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My research interest is the interior structure and the evolution of solid planets and satellites. I am involved in several exploration programs for Mercury, asteroids, and Jovian satellites.


Science Bldg. 8-2-07, Hokkaido University, Kita-10 Nishi-8, Kita-ku, Sapporo, Hokkaido, 060-0810, Japan



Our paper titled "Pluto's ocean is capped and insulated by gas hydrates" has been published in Nature Geoscience on May 20th, 2019. The press release of this work from Hokkaido University can be found here. This work is selected as one of Research Highlights by the publisher Springer Nature and is reported by many news media. Please read articles below:
PBS NOVA (US), Courthouse News (US), BBC Sky at Night Magazine (UK), Gizmodo (US), Cosmos Magazine (Austraria), Popular Science (US), Chemistry World (UK), Weekendavisen (Danish), Asia Research News (UK)

Research projects

Card image cap Courtesy NASA/JPL/SSI
Icy Satellites
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Card image cap Courtesy NASA
The Moon
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Card image cap Courtesy NASA/JHUAPL/SwRI
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