TV-Series
Description
Ryuken, originally known as Ramon Kasumi, rose to become the 63rd grandmaster of Hokuto Shinken. He was the younger half-brother of Kenshiro Kasumi, sharing a father but born of a different mother. In his youth, he operated as a bodyguard in Japan, shielding figures such as Aya Kitaōji and Pan Yuling from the grasp of criminal syndicates. He later took the dharma name Ryuken.

In the year 197X, he observed the birth of his nephew and bestowed upon him the name Kenshiro after identifying the infant’s distinctive Big Dipper-shaped birthmark, proclaiming the boy would inherit his brother's mantle as the ultimate practitioner of Hokuto Shinken. As an adult, Ryuken governed his life by the strict codes of his art, above all the Isshi Sōden principle decreeing a single heir. He took in four orphans—Raoh, Toki, Jagi, and Kenshiro—and schooled them in the ways of Hokuto Shinken. His first meeting with Raoh and Toki involved casting them from a cliff to test their fortitude, announcing he would train only one successor. Raoh challenged this decree by carrying Toki back to the summit, forcing Ryuken to accept them both.

Ryuken’s instruction was rooted in discipline and tradition. He confronted Raoh concerning his desire to dominate the wasteland, cautioning that such ambition would forever block his mastery of Hokuto Shinken. When Raoh spurned this warning, Ryuken moved to shatter his fists but was struck by a fatal heart attack amid the struggle, his health already failing. Seizing the moment, Raoh delivered the killing blow. With his last breath, Ryuken affirmed that Raoh’s pride had indeed shut him off from the style’s deepest secrets.

His presence endured after death through memory. Kenshiro and Raoh each recalled his guidance in moments of trial—such as when he counseled a young Raoh against yielding to rage during a clash with Juza. He also surfaced in Kenshiro’s recollection regarding the scar on Toki’s back, an injury Toki received while protecting Kenshiro from a falling tree, an act that later worsened Toki’s radiation sickness.

Ryuken’s legacy as master centered on upholding the integrity of Hokuto Shinken, though his unwavering commitment to the laws of succession ultimately fueled strife among his disciples, most tragically with Raoh. His death irrevocably set Raoh on his path as the conqueror Ken-Oh and helped forge Kenshiro into the successor he was destined to become.