He received his PhD. from Osaka University, Osaka, Japan in 1996. His doctoral thesis was about cluster formation in gas-solid flow predicted by the DSMC method. The works related to his thesis, which were published in Gas-Solid Flows 1993 (ASME-FED), JSME Int. J., and Powder Technology, etc., are widely cited. After he received his Ph.D., he studied plasma science at Tohoku University and his work was published in J. Appl. Phys, IEEE Trans. Plasma Sci., Jpn. J. Appl. Phys., etc. His research, particularly on Coulomb collision algorithm in high-density plasma published in J. Comput. Phys. is widely cited.