Robuta

https://www.animenewsnetwork.com/news/2021-12-04/adventure-tv-anime-orient-cast-member-wataru-hatano-also-sings-its-ending-theme/.180288
Hatano voices Kosameda Bushi leader Hideo Kosameda, sings "Naniiro" for January anime
cast memberwataru hatanoadventuretvanime