Profile

Introduction

My primary interests in geochemistry and cosmochemistry are the formation processes and evolutionary timescales of early solar system materials. I have approached these topics by investigating chemical and isotopical zoning patterns in minerals in extraterrestrial materials (i.e., meteorites, returned samples, micrometeorites) and by constraining major and trace elements diffusion kinetics in silicate minerals. In these endeavors, I have become proficient at using various Secondary Ion Mass Spectroscopy (SIMS) instruments over the past 25 years, including IMS-3f, 6f, IMS-1270, and NanoSIMS 50L (JSC and JAMSTEC). I have helped to develop and refine new techniques for high-quality isotopic measurement on the micro-scale level, isotope mapping with high precision and depth profiling for diffusion studies.

I have worked on a wide range of research topics, including: (1) timescales of formation of the first solar system solids (i.e., Ca, Al-rich Inclusions), (2) thermal and alteration histories of primitive meteorite parent bodies (3) determination of diffusion kinetic parameters, (4) studies of asteroidal and cometary samples returned by the JAXA Hayabusa and NASA Stardust missions, (5) extraterrestrial organics (i.e., insoluble organic matter) in primitive meteorites, and (6) Planetary exploration mission of the OKEANOS (in-situ isotope/organic molucules measurements utilizing the MULTUM, multi-turn time-of-flight mass spectrometer).

I will participate to the Hayabusa2 mission as a leader of Phase2 Curation "team Kochi" for analyzing return samples by the mission. The team “Kochi” consist of members from the Kochi Institute for Core Sample Research, JAMSTEC (KOCHI), JASRI/SPring-8, UVSOR Synchrotron/National Institutes of Natural Sciences, Institute for Molecular Science, National Institute of Polar Research (NIPR) and Tokyo Metropolitan University, Marine Works Japan, Osaka University, Aichi Synchrotron Radiation Center). We will conduct an in-depth analysis of grains by the state-of-the-artinstruments/techniques and nationwide collaborative research activities.

Professional Societies

• Japan Society for Research Policy and Innovation Management
• The Meteoritical Society
• The Geochemical Society of Japan
• The Japanese Society of Planetary Sciences
• Japan Geoscience Union
• The Japan Society for Analytical Chemistry

Education

• 1996–1999
  Doctor of Science, Department of Chemistry, Gakushuin University.
  Dissertation title: “Oxygen isotopic microanalysis by SIMS: A study of the formation process and thermal history of the Allende meteorite in the early solar system.”
• 1994–1996
  Master of Science, Department of Chemistry, Gakushuin University.
  Thesis title: “A study of cation diffusion in olivine by SIMS.”
• 1993–1994
  Tokyo University of Agriculture and Technology, Research Student.
  Department of Biotechnology and Life Science.
• 1989–1993
  Bachelor of Science, Science University of Tokyo, Department of Applied Chemistry.

Employment

• 2011-Present
  Senior research scientist, Japan Agency for Marine-Earth Science and Technology
• 2009–2011
  Research Scientist, NASA Johnson Space Center ARES, and the Lunar and Planetary Institute - USRA
• 2006-2009
  NASA Postdoctoral Program for Senior Research Fellow at Johnson Space Center
  (Supported by Oak Ridge Associated Universities)
• 2005–2006
  Lecturer for Fundamental Chemistry Class at Meiji University
• 2004–2006
  Postdoctoral Fellow, Radio Isotope Centre, University of Tokyo
  (Supported by JSPS Research Fellowships)
• 2001–2004
  Postdoctoral Fellow, Department of Geosciences, University of Arizona
  (Supported by JSPS Postdoctoral Fellowships for Research Abroad and JSPS Research Fellowships)
• 2000–2001
  Research Fellow, Earth and Planetary Sciences, Tokyo Institute of Technology
• 1999–2000
  Research Fellow, Faculty of Science, Department of Chemistry, Gakushuin University
• 1993–1999
  Teaching assistant (Inorganic and Analytical Chemistry Experiment)
  Department of Chemistry, Gakushuin University