Tokito Mikagura, founder and director of the Mikagura Detective Agency, thrived in the shadowed alleys of Taisho-era Japan. A disheveled yet brilliant investigator, he garnered fame for untangling intricate criminal puzzles before vanishing abruptly during his final case—an unsolved disappearance that stranded his three devoted assistants, Tomoe Kanose, Shigeno Kumiyama, and Chizuru Higaki, each harboring unspoken affections. Their search spiraled beyond Japan’s borders, confronting lethal foes and a priest’s cryptic corpse before tracing Tokito to an opium den’s haze, where he languished emaciated and addicted, ensnared in a shadowy scheme attributed to longtime rival Shougo Tokiwa, though definitive proof eludes resolution in certain retellings. Before his downfall, Tokito imparted rigorous training in deduction, pioneering the "Inference Trigger" framework—a systematic approach to isolating contradictions during interrogations and forensic examinations. This methodology anchored the agency’s operations even as its creator withered, his physical and mental unraveling eroding his once-commanding presence to expose fragile humanity beneath. The lingering ambiguities of his last case spawned the sequel *Zoku Mikagura Shoujo Tanteidan*, delving into the aftermath of his vanishing and Tokiwa’s far-reaching conspiracy. This continuation intertwined high-stakes missions with kinetic action sequences demanding split-second strategizing, reflecting the agency’s escalating perils. Transmedia iterations sustain Tokito’s legacy through cases weaving occult phenomena with Taisho-period historical enigmas. His bond with the trio endures as a narrative cornerstone, epitomizing their steadfast devotion and his enduring imprint on their pursuits despite absence or fractured resolve.