| Education | 1956-1960 | Bachelor of Engineering in applied physics, Keio University, Japan |
| 1960-1965 | Doctor of Engineering, University of Tokyo, Japan | |
| Professional experience: | 1965-1967 | Research Associate, Department of Applied Physics, University of Tokyo |
| 1967-1984 | Assistant Professor, Department of Applied Physics, University of Tokyo | |
| 1984-1997 | Professor, Department of Urban Environment Systems, Chiba University, Japan | |
| 1988-1989 | Invited professor, Laboratory of Numerical Analysis, University of Paris ‡Y, and INRIA, France | |
| 1989. 4-7 | Invited professor, Stanford University, Department of Applied Mathematics, U.S.A. | |
| 1992. 4-9 | Invited professor, University of Minesota, Institute for mathematics and its applications | |
| 1994. 5-7 | Russian Academy of Science, Institute of Numerical Mathematics, Russia | |
| 1995. 9-present | PAdjunct professor, University of Houston, Department of Mathematics | |
| 1996. 9-12 | Invited professor, University of Paris‡Y, Laboratory of Numerical Analysis, France | |
| Committee activities: | 1991-1992 | Vice president, Japan Society of Industrial and Applied Mathematics |
| 2000-2001 | President, Japan Society of Industrial and Applied Mathematics | |
| Editorial board member: | 1992- | East West Journal of Numerical Mathematics |
| 1992- | Advances in Mathematical Sciences and Applications | |
| 1994- | Journal of Computational Mathematics | |
| 1994- | Communications in Applied Analysis | |
| 1996- | International Sciences of Numerical Mathematics | |
| 1996- | Japanese Journal of Industrial and Applied Mathematics | |
| Activities as chairman of international conferences: | Nov., 1992 | Nonlinear Mathematical Problems in Industry, Iwaki Meisei University, Japan |
| May, 1995 | Parallel Algorithm for Scientific and Engineering Computations, Chiba University, Japan | |
| June, 1996 | Domain Decomposition Methods and Related Topics, RIMS. Kyoto University, Japan | |
| Aug., 1998 | The Fourth Japan-China Joint Seminar on Numerical Mathematics, Chiba University, Japan | |
| Oct., 1998 | Joint Japan-France Workshop on Computational Methods for Control Applications, Maison Franco-Japonaise, Tokyo Japan | |
| Oct., 1999 | 12th International Conference on Domain Decomposition Methods, Chiba University, Japan |