Question:
Who was the chair of University of Tokyo in Sep, 2020?

Context:
 Teruo Fujii is the chair of University of Tokyo from Apr, 2021 to Dec, 2022. 
 Junichi Hamada is the chair of University of Tokyo from Apr, 2009 to Mar, 2015. 
 Makoto Gonokami is the chair of University of Tokyo from Apr, 2015 to Mar, 2021.

Answer:
Makoto Gonokami