Place & Date of Birth: Shinjo, Yamagata Prefecture, JAPAN, May 11, 1974
Education:
| 1990-1992 | Yamagata Prefectural Shinjo North High School, JAPAN |
| 1993-1996 | Department of Mathematics, College of Science,
Rikkyo University, JAPAN Awarded a Bachelor's degree in Science |
| 1997-1998 | Division of Mathematics, Master Program Graduate School of Information Sciences, Tohoku University, JAPAN Awarded a Master's degree in Information Sciences |
| 1999-2001 | Division of Mathematics, Doctral Program Graduate School of Information Sciences, Tohoku University, JAPAN Awarded a Doctral degree in Information Sciences |
| 2002 | Division of Mathematics, Research Student Graduate School of Information Sciences, Tohoku University, JAPAN |
Occupation:
| 2003-2004 | Research Fellow (PD) of the Japan Society for the Promotion of Science. Department of Mathematics, School of Education, Waseda University, JAPAN |
| 2005-2007 | Associate professor in Department of Mathematics, Faculty of Education, Kanazawa University, JAPAN |
| 2008 | Associate professor in Faculty of Teacher Education, Institute of Human and Social Sciences, Kanazawa University, JAPAN |
| 2009-2016 | Associate professor in Department of Mathematical Sciences, School of Arts and Sciences, Tokyo Woman's Christian University, JAPAN |
| 2017- | Professor in Department of Mathematical Sciences, School of Arts and Sciences, Tokyo Woman's Christian University, JAPAN |