Wikipedia:Articles for deletion/Takuya Murata
If the most you can say is that he wrote a book chapter, he isn't notable enough. There appears to be a different Takuya Murata, a molecular biologist at the University of Tokyo, with moderately well-cited publications (the top one of which was retracted) but since the area is totally different I think it must be a different person. (I didn't see any math articles; there is no one by this name on MathSciNet.) For the Takuya Murata described here, we have no evidence of passing  nor any other notability criterion
— User:David, 06:19, 7 November 2019 (UTC)
Stance: delete
Cited policy: WP:PROF (Wikipedia:Notability)