 In "Fist of the Blue Sky", his real name is revealed to be Ramon Kasumi, younger half-brother of Yan Wang, Kenshiro Kasumi.In the original TV series, Ryuken was originally voiced by Junji Chiba, later replaced by Ryūji Saikachi in the later episodes and 1986 movie, with Kōji Totani as the younger version of him.He was also played by Chikao Ōtsuka in the "Shin Kyūseishu Densetsu" series, by Mugihito and Takashi Kondo (as a young boy) in the "Fist of the Blue Sky" anime series, and by Atsushi Ono in the "Ten no Haoh" anime series.