Torajirou, formerly a yakuza boss leading a rival clan to Tatsu's organization, earned underworld renown as the "Steelfist Tiger" for his bareknuckle combat prowess and raw power. He stood as the sole challenger to Tatsu's "Immortal Dragon" status until imprisonment halted his criminal career. During his incarceration, Tatsu dismantled Torajirou's gang. Released to find his clan gone, Torajirou forsook vengeance and channeled his manual dexterity into the food service industry. He now operates a food truck solo, initially selling crêpes before expanding to bubble tea—a transition showcasing adaptability and commitment to lawful work.

His physique retains a tank-like muscularity from his yakuza past, complemented by fair hair and eyebrows. A thin scar crosses his nose bridge and both cheeks, while intricate yakuza tattoos adorn his pectorals, shoulders, and forearms. In his culinary role, he employs deft precision with intense focus, crafting flawless dishes. Though initially resentful toward Tatsu, their dynamic shifted to non-violent competition in domestic skills and food preparation—dubbed "food wars"—reflecting grudging respect for Tatsu's househusband path. Torajirou expresses contentment with his food truck, finding purpose without violence, yet retains traces of yakuza speech and demeanor.

His name combines Japanese characters for "tiger," "two," and "son." Live-action adaptations assign him the surname Shirakawa ("white river"). Visually, his outfit echoes Kazuma Kiryu from the *Yakuza* series, reinforcing his gangster legacy. Across manga, anime, and live-action portrayals, his arc consistently moves from imprisoned yakuza to dedicated food-service worker, sustaining rivalry with Tatsu through culinary and domestic excellence.