On January 5, 2024, the Japan Patent Office (JPO) announced that the requirements for registration of trademarks that include the name of another person will be easesed based on the "Law for Partial Amendment of the Unfair Competition Prevention Act, etc." promulgated on June 14, 2023.
Applicable to applications filed on or after April 1, 2024.
Japan Patent Office:
https://www.jpo.go.jp/system/trademark/gaiyo/seidogaiyo/shimei.html