Our goal is to describe atoms that represent element distribution of the Solar system that are continuously evolving from the beginning to the future. To understand the Solar system with spatial scale 1013 m, we analyze planetary materials that are from different origin with different processes, and determine element and isotope compositions with spatial resolution down to 10-9 m.

Planetary materials besides terrestrial ones are the rolling stones that are sampled with locality unknown. To fill the important missing information, we developed a protocol that is to determine multiple-elements, multiple-isotopes, and multiple-phases. We referred the approach to be 'comprehensive' and construct an analytical system that let us do so. The system acts as a gigantic machine with numerous instruments glued by analytical methods and disciplined people. The disciplines and samples would be taken over to the next generation to sustain our science.

We work as a team and prefer arguments scientifically.

LATEST NEWS


sts group sts group
We run an outreach event related to the 7th Moon Village Workshop & Symposium on 12/09/2023 at Okayama. ムーンヴィレッジ・シンポジウムの開催にあわせ，12 月 9 日に岡山市でアウトリーチ・イベントを開催します．

11/15/2023

Insights into the formation and evolution of extraterrestrial amino acids from the asteroid Ryugu

03/31/2023

The amino acid abundances of two Ryugu particles were measured and compared with their rocky components. The results demonstrate the important role that water plays in the formation of amino acids on the giant precursors of asteroids like Ryugu. [ ... Read More ... 続きを読む ]

On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective

06/10/2022

A team of scientists undertake a comprehensive analysis of samples returned from the Japan Aerospace Exploration Agency’s Hayabusa2 mission and provide invaluable insights into the formation and evolution of our solar system. [ ... Read More ... 続きを読む ]

LATEST PUBLICATIONS

2026


Tanaka, R., Pack, A. and Coplen, T.B. Triple Oxygen Isotope Compositions of Isotopic Reference Waters: Implications for VSMOW-Scale and VSMOW–SLAP-Scale Δ′17O Calibration. Geostand Geoanal Res., (2026).

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M.C. Rowe, K.A. Campbell, D.A. Stallard, B. Lyon, A. Langendam, E. Kalinina, M. Yamanaka, R. Tanaka, T. Christopher, S.W. Ruff, E. Nersezova, T. Ota, A. Hamilton. Effects of secondary hydrothermal fluids on gallium distribution and coordination in hot springs silica using Ga K-edge XANES. Applied Geochemistry, 207, 106961, (2026).

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Nghiem V. Dao, Tsegereda A. Yemer, Tulibako T. Mwaisuba, Chie Sakaguchi, Hiroshi Kitagawa, Katsura Kobayashi, Teruyoshi Imaoka, Eizo Nakamura. Chemical Geodynamics of Granitoid Magmatism During a Pacific-Philippine Sea Plate Transition in Southwest Japan. Geochemistry, Geophysics, Geosystems, 27(5), e2026GC012945 (2026).

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Kobayashi, K., Asano, M., Tanaka, R., Hsiao, S.S.Y., Wang, S.L., Tamura, K., Lee, D.C. Organic matter–mineral associations in organic horizons in high-altitude areas of snowy mountains, northern Japan. CATENA, 269, 110130 (2026).

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Teni, G., Tanaka, R., Asano, M. & Tamura, K. Aeolian dust provenance across the Eurasian Asian steppe from grain-size dependent quartz δ18O in surface soils. CATENA, 269, 110109 (2026).

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Potiszil, C., Yamanaka, M., Ota, T., Sakaguchi, C., Kitagawa, H., Tanaka, R., Kunihiro, T., Kobayashi, K., and Nakamura, E.. Constraining the Effects of Pre- and Post-accretionary Processes on Ryugu Insoluble Organic Matter. The Astrophysical Journal, 999, 187 (2026).

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SEMINAR, SYMPOSIUM & WORKSHOP

2025-2026


July 7, 10:00 AM in 3F Seminar Room
Seminar by Ms. Tahsin Islam Ornee (MS student, Shimane U.)

June 9, 10:00 AM in 3F Seminar Room
Seminar by Prof. Sukanta Dey (Department of Earth Sciences, Indian Institute of Science Education and Research, Kolkata)

May 12, 10:00 AM in 3F Seminar Room
Seminar by Dr. Andreas Auer (Shimane University)

April 14, 10:00 AM in 3F Seminar Room
Seminar by Ms. Truptimayee Rath (D1, IPM)

October 28, 10:00 AM in 3F Seminar Room
Seminar by Ms. Arpapat TUNNARAT (M2, Department of Earth Sciences, Faculty of Science, Kasetsart University, Thailand)

October 7, 10:00 AM in 3F Seminar Room
Seminar by Mr. Sowmya Bhowmick (National Institute of Science Education and Research, India)

August 26, 10:00 AM in 3F Seminar Room
Seminar by Dr. Wei Zhang (University of Science and Technology of China)

August 20, 16:00-17:00 in 3F Seminar Room
PhD defence presentation by Mr. Rahul Kumar

August 19, 10:00-11:00 in 3F Seminar Room
PhD defence presentation by Mr.Torii Douglas-Song

July 2, 10:00 AM in 3F Seminar Room
Seminar by Mr.Torii Douglas-Song

June 24, 10:00 AM in 3F Seminar Room
Seminar by Mr. Rahul Kumar

April 22, 10:00 AM in 3F Seminar Room
Seminar by Dr. Eloïse Céline Brown



SOCIAL MEDIA

PML -Pheasant Memorial Labratory-