Kei Satō (born July 5, 1977), better known by the ring name Brahman Kei, is a Japanese pro wrestler currently working as a freelancer. He is one-half of the Brahman Brothers tag team alongside his identical brother Shū (as Brahman Shu). Together, they have won tag team championships in Big Japan Pro Wrestling (BJW), DDT Pro-Wrestling (DDT), Michinoku Pro Wrestling and Pro Wrestling Freedoms, among other promotions.