I studied Geophysics at Tokyo University for Batchelor (1970-1974) and then studied petrology in the graduate course for Geology at Tokyo University (1974-1979). I obtained my PhD in 1979 at Geology Department of Tokyo University under supervision of Prof. Ikuo Kushiro. After 2 years of PD in Geophysical laboratory (1979-1980), Carnegie Institute of Washington, I became an Assistant Professor at Institute for Study of the Earth’s Interior, Okayama University (1981-1988). Since 1988 until my retirement in 2017, I was a faculty member of Earth and Planetary Science Department of Tokyo Institute of Technology (1988-1993 Associate Professor; 1994-2017 Professor).  After retired from Tokyo Institute of Technology, I became a research professor at the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences.

　　My research aim is to understand magma genesis and deep Earth geodynamics through intensive studies on mantle rocks, volcanic rocks and high-pressure experiments up to the lower mantle pressures. In Tokyo Tech., I built an experimental petrology laboratory (Magma Factory) that includes internally heated gas vessels (up to 0.9 GPa), piston-cylinders (up to 3.5 GPa) and Kawai-type and Cubic-type multi-anvils (up to 50GPa). By the collaboration agreement between Tokyo Tech. and Chinese Academy of Sciences, I moved much of the experimental apparatus to the Guangzhou Institute of Geochemistry, CAS. My goal at GIG-CAS is to collaborate many scientists and young students and pursue further development of very high-pressure experimental studies in China. At GIG, I focus my research to elucidate the role of water in magma genesis and in planetary evolution of the Earth and other planets.

　　I organized and lead following projects in Japan that includes; Japan-US joint research project on Hawaiian volcanoes using JAMSTEC ships and submersibles (1998-2002, Hawaiian Volcanoes, Deep Underwater Perspectives AGU Monograph vol.128), 21COE “How to build habitable planets” (2004-2008, MEXT Japan), Mega Research Project “Geofluid: Nature and dynamics of fluids in subduction zones” (2011-2016, MEXT Japan). I have received following honors: Clarke Award (1987, Geochemical Society), 文部科学大臣表彰科学技術者賞（2007, 日本国文部科学省）Volcanological Society Award (2015, The Volcanological Society of Japan), AGU Fellow (2016, American Geophysical Union), JpGU Fellow (2018, Japan Geoscience Union), 紫綬褒章（2018, 日本国政府）.

Publications since 2018: at GIG

Absence of water content contrast between lithosphere and asthenosphere in subduction zone, Yuto Sato*, Eiichi Takahashi*, Chang-Ming Xing, Li Li, Ze-Xian Cui1, Wan-Feng Zhang, Xiao-Ping Xia1, Earth Planet. Sci. Lett, in press.

Single-crystal elasticity of phase E at high pressure and temperature: Implications for the low-velocity layer atop the 410-km depth　Baoyun Wang, Yanyao Zhang, Suyu Fu, Xing Ding, Wen Liang, Eiichi Takahashi, Li Li, Sergey N. Tkachev, Vitali B. Prakapenka, Jung-Fu Lin and Maoshuang Song. J. Geophys. Res. solid Earth, in press

Single-crystal elasticity of phase Egg AlSiO₃OH and d-AlOOH by brillouin spectroscopy.  Baoyun Wang, Yanyao Zhang, Suyu Fu, Wei Yan, Eiichi Takahashi, Li Li, Jung-Fu Lin and Maoshuang Song (2022) American Mineralogist, Volume 107, pages 147–152, 　 https://doi.org/10.2138/am-2022-8056

Simultaneous analysis of seismic velocity and electrical conductivity in the crust and the uppermost mantle: I.  A forward model and inversion based on grid search.　Hikaru Iwamori, Kenta Ueki, Takashi Hoshide, Hiroshi Sakuma, Masahiro Ichiki, Tohru Watanabe, Michihiko Nakamura, Hitomi Nakamura, Tatsuji Nishizawa, Atsushi Nakao, Yasuo Ogawa, Tatsu Kuwatani, Kenji Nagata, Tomomi Okada, , Eiichi Takahashi　(2021)  Journal of Geophysical Research: Solid Earth, 126, https://doi.org/10.1029/2021JB022307

Zircon Solubility in Solute-Rich Supercritical Fluids and Zr Transfer From Slab to Wedge in the Deep Subduction Process, Wei Chen, Xiaolin Xiong, Eiichi Takahashi (2021) Journal of Geophysical Research: Solid Earth,126, https://doi.org/10.1029/2021JB021970

Element loss to platinum capsules in high-temperature–pressure experiments, J Wang, X Xiong, L Zhang, and E Takahashi (2020) American Mineralogist, vol.105, p.1593-1597. https://doi.org/10.2138/am-2020-7580

The water-saturated solidus and second critical endpoint of peridotite: Implications for magma genesis within the mantle wedge, Jintuan Wang, Eiichi Takahashi, Xiaolin Xiong, Linli Chen, Li Li, Toshihiro Suzuki and Michael Walter (2020), J. Geophys. Res.: Solid Earth, Vol.125, https://doi.org/10.1029/2020JB019452

Preeruptive P-T Conditions and H₂O Concentration of the Aso-4 Silicic End-Member Magma Based on High-Pressure, Masashi Ushioda, Isoji Miyagi, Toshihiro Suzuki, Eiichi Takahashi and Hideo Hoshizumi, J. Geophys. Res.: Solid Earth, Vol.125 issue 3, (2020) https://doi.org/10.1029/2019JB018481

Sulfur abundance and heterogeneity in the MORB mantle estimated by copper partitioning and sulfur solubility modelling　Z Sun, X Xiong, J Wang, X Liu, L Li, M Ruan, L Zhang, E Takahashi　Earth and Planetary Science Letters 538, 116169 (2020) https://doi.org/10.1016/j.epsl.2020.116169

Optimization of SIMS analytical parameters for water content measurement of olivine, W-F, Zhang, X-P.Xia, E.Takahashi, Li Li, Q.Yang, Y-Q. Zhang, Y-N. Yang, M-L., Liu and C.Lai, (2019)  Surface and Interface Analysis, https://doi:10.1002/sia.6729

Hydrous LABZ beneath a subduction zone was reconstructed for the first time, (2019), Eiichi Takahashi., Amer. Mineral., doi.org/10.2138/am-2019-7113.

Oxidation state of arc mantle revealed by partitioning of V, Sc and Ti between mantle minerals and basaltic melts, Jintuan Wang, Xiaolin Xiong, Eiichi Takahashi, Le Zhang, Li Li, Xingcheng Liu (2019) J. Geophys. Res.: Solid Earth, doi: 10.1029/2018JB016731

Halogen heterogeneity in the lithosphere and evolution of mantle halogen abundances inferred from intraplate mantle xenoliths. (2019) Masahiro Kobayashi, Hirochika Sumino, Ray Burgess, Shun'ichi Nakai, Tsuyoshi Iizuka, Jun Nagao, Hiroyuki Kagi, Michihiko Nakamura, Eiichi Takahashi, Tetsu Kogiso, and Chris J. Ballentine,  Geochemistry, Geophysics, Geosystems, 20. https://doi.org/10.1029/2018GC007903

Stability of hydrous minerals of Al-phase D and Al-phase H in deep subducted oceanic crust (2019) Xingcheng Liu, Kyoko Matsukage, Yu Nishihara, Toshihiro Suzuki and Eiichi Takahashi, Amer. Mineral. Vol.104, p.64-72 https://doi.org/10.2138/am-2019-6559

Aqueous fluid connectivity in subducting oceanic crust at the mantle transition zone conditions. (2018) Liu, X., Matsukage, K. N., Li, Y., Takahashi, E., Suzuki, T., & Xiong, X. J.Geophysical Research: Solid Earth, 123, 6562–6573. https://doi.org/10.1029/ 2018JB015973

Evolution of magma plumbing system in Miyakejima volcano: Constraints from melting experiments (2018) Masashi Ushioda* Eiichi Takahashi*, Morihisa Hamada, Toshihiro Suzuki, and Kenji Niihori, Journal of Geophysical Research: Solid Earth 123. https://doi.org/10.1029/2018JB015910

Selected previous publications:

1. Mantle dynamics inferred from the crystallographic-preferred-orientation of bridgmanite N. Tsujino, Y. Nishihara, D. Yamazaki, Y. Seto, Y. Higo, and E. Takahashi, Nature,vol. 539, 81-84, 2016. 　

2. Phase relations in the system MgO-FeO-SiO₂ to 50 GPa and 2000 C: an application of experimental techniques using multi-anvil apparatus with sintered diamond anvils, Y.Tange*, E.Takahashi, Y.Nishihara, K.Funakoshi and N.Sata J. of Geophysical Res. 114, B02214, 2009.

3. Melting phase relation of FeHx up to 20 GPa:　Implication for the temperature of the Earth’s core, K. Sakamaki E. Takahashi*, Y. Nakajima,Y. Nishihara, K. Funakoshi T.Suzuki and Y. Fukai Physics, Earth Planet. Inter., vol.174, 192-201. 2009.

4. Volcanism in Response to plate flexure, N. Hirano, E. Takahashi, J. Yamamoto, N. Abe, S.P. Ingle, I. Kaneoka, T. Hirata, J. Kimura, T. Ishii, Y. Ogawa, S. Machida and K. Suyehiro, Science, 313, 1426-1428, 2006.

5. The chemical structure of the Hawaiian mantle plume, Zhong-Yuan Ren, S. Ingle, E. Takahashi, N. Hirano, T. Hirata, Nature, 436, 837-840, 2005.

6. Experimental constraints on the role of garnet pyroxenite in the genesis of high-Fe mantle plume derived melts,  J. Tuff, E.Takahashi and S.A. Gibson, J. Petrology, 46, 2023-2058, 2005.

7. Petrogenesis of tholeiitic lavas from the submarine Hanaridge, Haleakala volcano, Hawaii, Z.-Y. Ren, E.Takahashi, Y.Orihashi, K.T.M.Johnson, J.Petrology, 43, 2067-2104, 2005.

8. Melting Process in the Hawaiian plume:　An experimental study　Eiichi Takahashi and Katsuji Nakajima, In Hawaiian Volcanoes: Deep underwater perspectives,  Amer. Geophys. Union, Monograph, vol.128 403-418, 2002.

9.  Subsolidus and melting experiments of K-doped peridotite KLB-1 to 27GPa: its geophysical and geochemical implications, W. Wang and E. Takahashi, J. Geophys. Res, 105, 2855-2868, 2000.

10. Origin of the Columbia River Basalts: Melting model of a heterogeneous plume head. E.Takahashi , K.Nakajima and T.L. Wright, Earth Planet. Sci. Lett., 162, 63-80, 1998.

11. Reconstruction of a magma chamber evolution beneath Usu-volcano.  A. Tomiya and E.Takahashi,  J. Petrol., 36, 617-636, 1995.

12. Melting study of a peridotite KLB-1 to 6.5 GPa and the origin of basaltic magmas.  E.Takahashi, T.Shimazaki, Y.Tsuzaki, H.Yoshida,  Phil. Trans. R. Soc. Lond. Ser, A, 342, 105-120, 1993.

13. Speculation on the Archean Mantle: Missing link Between Komatiite and Depleted garnet peridotite, E. Takahashi, J. Gerophys. Res., 95, 15941-15954, 1990.

14. Postspinel Transformations in the system Mg₂SiO₄-Fe₂SiO₄ and some geophysical implications, E. Ito and E. Takahashi, J. Geophys. Res., 94, 10637-10646, 1989.

15. Melting of peridotite at uppermost lower mantle conditions, E.Ito and E.Takahashi, Nature, 328, 514-517, 1987.

16. Melting of a dry peridotite KLB-1 up to 14GPa: implications on the origin of peridotite upper mantle, E. Takahashi, J. Geophys. Res., 91, 9367-9382, 1986.

17. Genesis of calc alkali andesite magma in ahydrous mantle-crust boundary: Petrology of lherzolite xenoliths from the Ichinomegata crater, Oga peninsula, Northeast Japan, Part II,  E.Takahashi, J. Volcanol., Geotherm. Res., 29, 355-395, 1986.

18. Melting of peridotite to 14GPa and the genesis of komatiite, E.Takahashi and C.M.Scarfe, Nature, 315, 566-568, 1985.

19. Melting of a dry peridotite at high pressures and basalt magma genesis, E. Takahashi and I. Kushiro, Amer. Mineral., 68, 859-879, 1983.

20. Partitioning of Ni^2+, Co²⁺, Fe²⁺, Mn²⁺ and Mg²⁺ between olivine and silicate melts: compositional dependence of partition coefficient, E.Takahashi, Geochim Cosmochim Acta, 42,1829-1844, 1978.