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


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

2024-2025


Wei Zhang, Hiroshi Kitagawa, Fang Huang, Magnesium isotope composition of volcanic rocks from cold and warm subduction zones: Implications for the recycling of subducted serpentinites and carbonates. Geochimica et Cosmochimica Acta, 391, 158-176 (2025).

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Küçükarslan, N., Ota, T., Potiszil, C., Kobayashi, K., Exploring the Evidence for the Early Bronze Age Iron Production at Kaman-Kalehöyük, In: Maner, C., Weeden, M., Omura, M., Matsumura, K., Harrassowiz, V., Wiesbaden (Eds) It All Began with Stratigraphy and Chronology, XVIII, 506, pp. 337-358 (2025), ISBN: 978-3-447-12202-3.


Christian Potiszil, Tsutomu Ota, Masahiro Yamanaka, Katsura Kobayashi, Ryoji Tanaka, Eizo Nakamura, Meteoritic and asteroidal amino acid heterogeneity: Implications for planetesimal alteration conditions and sample return missions. Earth and Planetary Science Letters, 653, 119205 (2025).

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Li, Y.Q, Kitagawa, H., Ma, C.Q., Nakamura, E., Sakaguchi, C., Kobayashi, K., Hu, X.Y. Deep recycling of volatile elements in the mantle: Evidence from the heterogeneous B isotope in intra-plate basalts. Geoscience Frontiers, 15(6), 101900 (2024).

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Auer, A., Belousov, A., Belousova, M., Kitagawa, H., Kobayashi, K. Tridymite formation as a direct consequence of explosive volcanism – evidence preserved in tuffisite veins and concurrently erupted volcanic ash. New Zealand Journal of Geology and Geophysics, pp.1-15 (2024).

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Kitagawa, Y., Nakao, A., Tanaka, R., Takeda, A., Yamada, D., Evrard, O., & Yanai, J. Relative importance of Asian-dust-derived micas estimated from oxygen isotopic analysis of fine quartz on specific retention of radiocesium in Andosols in Tohoku Region, Japan, Soil Science and Plant Nutrition, 70 (5–6), pp.375–386 (2024).

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SEMINAR, SYMPOSIUM & WORKSHOP

2024


November 19, 10:00 AM in 3F Seminar Room
Seminar by Ms. Esmira Bibaj (PhD Candidate at Lehigh University)


November 5, 10:00 AM in 3F Seminar Room
Seminar by Mr. Adam Greig Corbett (PML)


October 22, 10:00 AM in 3F Seminar Room
Seminar by Mr. Rahul Kumar (PML)


October 15, 10:00 AM in 3F Seminar Room
Seminar by Mr.Torii Douglas-Song (PML)


October 8, 10:00 AM in 3F Tee Room
Seminar by Mr. Juan Felipe Bustos Moreno (Lehigh University, USA)


July 26, 10:00 AM in 3F Tee Room
Seminar by Dr. Wentao Cao (State University of New York at Fredonia)


June 21, 10:00 AM in 3F Tee Room
Seminar by Prof. María Isabel Marín-Cerón (EAFIT University, School of Applied Sciences and Engineering, Colombia)


May 21, 10:00 AM in 3F Seminar Room
Seminar by Dr. Natalia Pravikova (Lomonosov Moscow State University)


February 21, 10:00 AM in 3F Seminar Room
Interim defence presentation by Noah Miklusicak


February 9, 13:30 in 3F Seminar Room
PhD defence presentation by Dilan M. Ratnayake


January 31, 10:00 AM in 3F Tea Room
Seminar by Alebachew Tareke Kehali (The United Graduate School of Agricultural Sciences, Tottori University)




SOCIAL MEDIA