2022年-，中国科学院青海盐湖研究所，研究员；
2020年-，从福冈大学退休为名誉教授；
2019-2022年，中国科学院青海盐湖研究所，客座教授；
2013-2017年，福冈大学理学院，院长；
2001年，伦敦大学学院和布里斯托尔大学，客座教授；
1994年，福冈大学，全职教授；
1989-1991年，日本分子科学研究所，客座副教授；
1978-1979年，东京理工学院，副研究员；
1989年，哥德堡大学，客座教授；
1986年，福冈大学，副教授；
1985年，美因茨马克斯·普朗克研究所，客座研究员；
1982-1986年，东京理工学院，助理教授；
1979-1982年，瑞典哥德堡大学，博士后；
1978年，东京理工学院，获博士学位；
1973年，名古屋理工学院，获理学学士学位。
山口敏男教授的重点研究领域是通过X射线、中子散射及X射线吸收光谱研究液体和溶液的结构和动力学。他开发了X射线和中子散射设备，用于测量较宽浓度、温度和压力范围内溶液的静态结构和动力学性质。他的研究课题包括溶液中的金属离子和络合物、水合有机溶剂、超临界流体、界面和受限条件下的液体和蛋白质变性等。他当前的研究兴趣集中在吉帕压力范围内的水和水溶液的结构测定以及悬浮在空气中的单个液滴。
Hamon主席奖，2020年11月，日本中子科学学会 。
1. Guangguo Wang, Yongquan Zhou, Toshio Yamaguchi, Hongyan Liu, Fayan Zhu, Zhijian Wu, Structure of Aqueous CaCl2Solutions by X-ray Scattering and Density Functional Theory, Russian Journal of Physical Chemistry A, 96(S1), S68–S76, 2022
2. Toshio Yamaguchi,* Sota Higa, Koji Yoshida, Kazushi Sumitani, Tsutomu Kurisaki, Structure of Aqueous Scandium(III) Nitrate Solution by Large-Angle X-ray Scattering Combined with Empirical Potential Refinement Modeling, X-ray Absorption Fine Structure, and Discrete Variational Xα Calculations, Bulletin of the Chemical Society of Japan, 95(4), 673–679, 2022
3. Jun Shirai, Koji Yoshida, Hiroki Koreeda, Takehiko Kitamori, Toshio Yamaguchi, Kazuma Mawatari, Water structure in 100 nm nanochannels revealed by nano X-ray diffractometry and Raman spectroscopy, Journal of Molecular Liquids, 350, 118567–118567,2022
4. W.Q. Zhang, T. Yamaguchi*, C.H. Fang, K. Yoshida, Y.Q. Zhou, F.Y Zhu, S. Machida, T. Hattori, W. Li, ,Structure of an aqueous RbCl solution in the gigapascal pressure range by neutron diffraction combined with empirical potential structure refinement modeling, Journal of Molecular Liquids, 348, 118080–118080, 2022
5. Toshio YAMAGUCHI,* Nami FUKUYAMA, Koji YOSHIDA, Yoshinori KATAYAMA, Ion Solvation and Association and Water Structure in an Aqueous Cerium(III) Chloride Solution in the Gigapascal Pressure Range, Analytical Sciences, 38, 409–417, 2022
6. Shinya Hosokawa, Takashi Kamiyama, Koji Yoshida, Toshio Yamaguchi, Satoshi Tsutsui, Alfred Q.R. Baron, Collective dynamics of liquid acetone investigated by inelastic X-ray scattering, Journal of Molecular Liquids, 332, 115825–115825, Mar, 2021
7. Toshio Yamaguchi,* Nami Fukuyama, Koji Yoshida, Yoshinori Katayama, Ion Solvation and Water Structure in an Aqueous Sodium Chloride Solution in the Gigapascal Pressure Range, The Journal of Physical Chemistry Letters, 12, 250–256, 2021
8. K. Yoshida, T. Yamaguchi,* D. T. Bowron, J. L. Finney, The structure of aqueous solutions of hexafluoro-iso-propanol studied by neutron diffraction with hydrogen/deuterium isotope substitution and empirical potential structure refinement modeling, Physical Chemistry Chemical Physics, 23, 13561–13573, 2021
9. Fayan Zhu, Toshio Yamaguchi, Koji Yoshida, Wenqian Zhang, Hongyan Liu, Yongquan Zhou, Chunhui Fang, Ion hydration and association in aqueous potassium tetrahydroxyborate solutions, The Analyst, 145, 2245–2255, 2020
10. Ryo Sakamoto, Maho Yamashita, Kosuke Nakamoto, Yongquan Zhou, Nobuko Yoshimoto, Kenta Fujii, Toshio Yamaguchi, Ayuko Kitajou, Shigeto Okada, Local structure of a highly concentrated NaClO4aqueous solution-type electrolyte for sodium ion batteries, Physical Chemistry Chemical Physics, 22, 26452–26458, 2020
11. Toshio Yamaguchi,* Structure of water under high pressure,Fukuoka University Science Reports, 50, 78–91, 2020
12. Yongquan Zhou, Toshio Yamaguchi, Kazutaka Ikeda, Koji Yoshida, Toshiya Otomo, Chunhui Fang, Wenqian Zhang, Fayan Zhu, Dihydrogen Bonds in Aqueous NaBD4Solution by Neutron and X-Ray Diffraction, J. Phys. Chem. Lett., 11, 1622–1628, 2020
13. Y. Zhou, T. Yamaguchi, W. Zhang, K. Ikeda, K. Yoshida, F. Zhu, H. Liu, The structural elucidation of aqueous H3BO3solutions by DFT and neutron scattering studies, Phys. Chem. Chem. Phys., 22, 17160–17170, 2020
14. Y. Zhou, T. Yamaguchi, K. Ikeda, C. Fang, K. Yoshida, W. Zhang, F. Zhu, H. Liu, G Wang, Structure of liquid water studied by neutron and x-ray scattering; temperature effects, Chemical Report, 83, 434–441, 2020
15. T. Yamaguchi,* M. Nishino, K. Yoshida, M. Takumi, K. Nagata, T. Hattori, Ion Hydration and Association in an Aqueous Calcium Chloride Solution in the GPa range, Eur. J. Inorg. Chem., 1170–1177, 2019
16. K. Yoshida, H. Uchiyama, T. Yamaguchi, Structure and dynamical properties of hydrated F-actin investigated by X-ray scattering, Journal of Molecular Liquids, 291, 111265, 2019
17. Koji Yoshida, Toshio Yamaguchi, Generalized Langevin analysis of inelastic X-ray scattering for copper/ethylene glycol nanofluid, Chemical Physics Letters, 718, 74–79, 2019
18. Y. Zhou, T. Yamaguchi, K. Yoshida, C.H. Fang, Y. Fang, F. Zhu, Structure of alkaline aqueous NaBH4 solutions by x-ray scattering and empirical potential structure refinement , J. Mol. Liq., 274, 173–182, 2019
19. Kanae Ito, Antonio Faraone, Madhusudan Tyagi, Toshio Yamaguchi, Sow-Hsin Chen, Nanoscale dynamics of water confined in ordered mesoporous carbon , Physical Chemistry Chemical Physics, 21, 8517–8528, 2019
20. Koji Yoshida, Toshio Yamaguchi, Structure and dynamics of water observed over a wide energy range, Hamon, 29, 86–90, 2019
21. Koji Yoshida, Shigeru Ishida, Toshio Yamaguchi*, Hydrogen bonding and clusters in supercritical methanol-water mixture by neutron diffraction with H/D substitution combined with empirical potential structure refinement modeling, Mol. Phys., 117, 3297–3310, 2019
22. Ryo Sakamoto, Kosuke Nakamoto, Ayuko Kitajo, Hiroki Murakami, Haruka Hirai, Satoshi Takanak, Yongquan Zhou, Toshio Yamaguchi, Higeto Okada, Concentrated aqueous electrolyte aimed at establishing high-voltage aqueous batteries, Electrochemistry, 87, 220–226 2019
23. K. Yoshida, T. Zenin, A. Fujiyoshi, Y. Sanada, T. Yamaguchi, K. Murata, S. Tanaka, K. Hiroi, T. Takekiyo, Y. Yoshimura, 293The effect of alkyl ammonium ionic liquids on thermal denaturation aggregation of β-lactoglobulin,. J. Mol. Liquids, 293, 111477, 2019
24. Tsuyoshi Yamaguchi, Ryuya Ando, Koji Yoshida, Toshio Yamaguchi, Hiroshi Machida, Shear Viscosity and Heterogeneous Structure of Alkylaminoethanol-Based CO2 Absorbents, Journal of Physical Chemistry B, 122, 4045–4050, 2018
25. Yongquan Zhou, Yoshie Soga, Toshio Yamaguchi, Yan Fang, Chunhui Fang, Structure of aqueous RbCl and CsCl solutions using X-ray scattering and empirical potential structure refinement modelling, Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica, 34, 483–491, 2018
26. Kazuma Mawatari, Hiroki Koreeda, Koji Ohara, Shinji Kohara, Koji Yoshida, Toshio Yamaguchi, Takehiko Kitamori, Nano X-ray diffractometry device for nanofluidics, Lab on a Chip, 18, 1259–1264, 2018
27. Tsuyoshi Yamaguchi, Makina Saito, Koji Yoshida, Toshio Yamaguchi, Yoshitaka Yoda, Makoto Seto, Structural Relaxation and Viscoelasticity of a Higher Alcohol with Mesoscopic Structure, J. Phys. Chem. Lett., 9, 298–301, 2018
28. K. Yoshida, T. Inoue, M. Torigoe, T. Yamada, K. Shibata, T. Yamaguchi*, Structure analysis of electrolyte solultion with X-rays and neutrons under high temperatures and high pressures (in Japanese), Rev. High Pres. Sci. Tech., 28, 72–80, 2018
29. K. Yoshida, T. Inoue, M. Torigoe, T. Yamada, K. Shibata, T. Yamaguchi, Thermal behavior, structure, dynamic properties of aqueous glycine solutions confined in mesoporous silica MCM-41 investigated by X-ray diffraction and quasi-elastic neutron scattering, J. Chem. Phys. 149, 124502 2018
30. Kazuhisa Yano, Koji Yoshida, Kazuya Kamazawa, Hiroshi Uchiyama, Satoshi Tsutsui, Alfred Q. R. Baron, Yoshiaki Fukushima, Toshio Yamaguchi, Investigation of collective dynamics of solvent molecules in nanofluids by inelastic x-ray scattering, Journal of Molecular Liquids, 248, 468–472, 2017
31. Yongquan Zhou, Koji Yoshida, Toshio Yamaguchi, Hongyan Liu, Chunhui Fang, Yan Fang,Microhydration of BH4-: Dihydrogen Bonds, Structure, Stability, and Raman Spectra, Journal of Physical Chemistry A, 121, 9146–9155, 2017
32. Yongquan Zhou, Souta Higa, Chunhui Fang, Yan Fang, Wenqian Zhang, Toshio Yamaguchi, B(OH)4-hydration and association in sodium metaborate solutions by X-ray diffraction and empirical potential structure refinement, Physical Chemistry Chemical Physics, 19, 27878-27887, 2017
33. Takahiro Takekiyo, Koji Yoshida, Yu Funahashi, Shunya Nagata, Hiroshi Abe, Toshio Yamaguchi, Yukihiro Yoshimura, Helix-forming ability of proteins in alkylammonium nitrate, Journal of Molecular Liquids, 243, 584-590, 2017
34. Tsuyoshi Yamaguchi, Koji Yoshida, Toshio Yamaguchi, Michihiro Nagao, Antonio Faraone, Shiro Seki, Decoupling between the Temperature-Dependent Structural Relaxation and Shear Viscosity of Concentrated Lithium Electrolyte, Journal of Physical Chemistry B, 121, 8767-8773, 2017
35. Koji Yoshida, Nami Fukuyama, Toshio Yamaguchi, Shinya Hosokawa, Hiroshi Uchiyama, Satoshi Tsutsui, Alfred Q. R. Baron, Inelastic X-ray scattering on liquid benzene analyzed using a generalized Langevin equation, Chemical Physics Letters, 680, 1–5, 2017
36. Tsuyoshi Yamaguchi, Koji Yoshida, Toshio Yamaguchi, Yasuo Kameda, Kazutaka Ikeda, Toshiya Otomo, Analysis of Prepeak Structure of Concentrated Organic Lithium Electrolyte by Means of Neutron Diffraction with Isotopic Substitution and Molecular Dynamics Simulation, Journal of Physical Chemistry B, 121, 5355-5362, 2017
37. Shigeharu Kittaka, Koji Yoshida, Toshio Yamaguchi, M. -C. Bellissent Funel, Peter Fouquet, A neutron spin echo study of low-temperature water confined in the spherical silica pores of SBA-16, Physical Chemistry Chemical Physics, 19,10502-10510, 2017
他在国际期刊上发表/合著287篇科学出版物，被引用次数超7000次，H-指数为45。他曾获得过2016年日本中子科学会奖和2013年日本分析化学会奖。
1．空气中单液滴悬浮物原位结构分析的开发和气溶胶反应的应用，科学研究资助金（C）（No. 19K05551），日本科学促进会，2019年4月-2023年3月，4290,000日元；
2．利用激光捕获法研究气溶胶液滴的微观结构，福冈大学研究生院优先基金，2017年4月-2018年3月，4060,00日元；
3． 气溶胶液滴的X射线衍射与激光捕获法相结合的发展，科学研究资助金（B）（No. 26288073），日本科学促进会，2014年4月-2017年3月，6700,000日元。