Ryuken

Ryūken (リュウケン, Ryūken)

Voiced by: Junji Chiba (TV series) → Ryūji Saikachi (TV series), Kōji Totani (TV series, as a young man), Chikao Ōtsuka (Shin Kyūseishu Densetsu movie series)

Ramon Kasumi (霞 羅門 Kasumi Ramon), later known as Ryūken (リュウケン), was Kenshirō's adoptive father and the 63rd successor of Hokuto Shin Ken.

Souten no Ken

Voiced by: Mugihito (Souten no Ken), Takashi Kondō (young, Souten no Ken)

He named Kenshirō after his older brother, Kenshirō Kasumi, because they both had a Big Dipper-shaped birthmark. His refers to his older brother as the "Strongest Hokuto Shin Ken warrior" who is as "mighty as the blue sky above." The young Ramon first protected Aya Kitaoji from hired thugs, later serving as a bodyguard to Pān Yù-Líng from the Tài Hú Bāng during her stay in Japan. Ramon is later revealed to be Kenshiro's half-brother, since Kenshiro was born from a different mother.

Hokuto no Ken

Ryūken successfully battled with Kōryū for successorship of Hokuto Shin Ken. He was the sifu who adopted and trained Raoh, Toki, Jagi, and Kenshirō. After choosing Kenshirō as the next successor, Ryūken suffered a heart attack just when he was about to seal Raoh's fist after failing to prevent his misuse of Hokuto Shin Ken. Kenshirō did not know about Raoh's involvement in Ryūken's death, having been told that Ryūken simply died from illness, until Toki revealed the shameful secret during their first battle.