Kansuke Yamato, a Nagano police inspector, bears an X-shaped scar over his left eye and relies on a forearm crutch due to permanent leg damage from an avalanche during a pursuit of a parole jumper connected to the unsolved death of Kai Kuroto—the officer who inspired Yamato and childhood friend Yui Uehara to join the force. After days missing in the avalanche's aftermath, school friend Taka'aki Morofushi, a fellow inspector, defied orders to locate and rescue him. Raised in rural Nagano with Uehara, Yamato dedicated himself to unraveling Kuroto’s death, ultimately cracking the case through collaboration with Conan Edogawa and Heiji Hattori. This closure prompted Uehara to become his subordinate. His brash demeanor contrasts with peers, combining a short temper with a hard-boiled interrogation style, yet remains subtly attuned to Uehara's unspoken feelings. He engages in a relentless race to solve cases before Morofushi, though their rivalry coexists with unwavering loyalty, demonstrated when Yamato plunged into a burning building to save his rival. He acknowledges Conan's deductive prowess, granting him equal standing—an uncommon respect from adult peers. In *One-eyed Flashback*, a parabolic antenna’s activation at Nobeyama National Observatory reactivates his trauma, sending searing pain through his scarred eye. This echoes the avalanche triggered by a suspect’s rifle shot, which originally claimed his mobility and vision. The investigation intertwines with a national security conspiracy spanning an eight-year-old robbery and a Tokyo murder. Yamato teams with Kogoro Mouri and Conan to confront lingering threats, culminating in a mountain chalet showdown where multiple lives hang in balance. Additional cases, like the Furinkazan investigation, see Yamato and Morofushi decipher a cryptic Italian flag-linked message, while the Red Wall Case deepens their complex dynamic. Kuroto's legacy fuels Yamato's relentless pursuit of justice, while physical constraints forge his adaptive investigative tactics.