• Doctor of Science, Graduate School of Science, Kyoto University, November 2001. 

• Master of Mathematical Sciences, Graduate School of Mathematical Sciences, University of Tokyo, March 1999.

• Apr. 2026 - present Professor, The University of Tokyo 

• Oct. 2013 - Mar. 2026 Professor, Chiba University 

• Dec. 2007 - Sep. 2013 Associate Professor, Chiba University 

• Dec. 2001 - Nov. 2007 Assistant Professor, Chiba University 

• Apr. 2013 - Sep. 2013 University of Copenhagen, Denmark 

• Jun. 2005 - Jan. 2006 University of Victoria, Canada 

• Nov. 2012, Operator Algebra Prize (Japan) 

• Sep. 2011, Analysis Prize, the Mathematical Society of Japan 

• Jul. 2018 - Jun. 2024 Journal of the Mathematical Society of Japan 

Former graduate students (since 2025): 

• Takehiko Mori, Ph.D. (Science), Chiba University, Sep. 2025. 

Current graduate students: 

• Akihiko Arai 

• Toyoshige Aoyama 

• Shingo Yorii