Kogoro Mouri, known as Richard Moore in English adaptations, runs the Mouri Detective Agency in Beika Town. An alumnus of Teitan High School alongside Eri Kisaki, Yukiko Fujimine, and Ruri Ujo, he graduated from Beika University as the judo team ace despite battling stage fright. He then joined the Tokyo Metropolitan Police Department's Division One, working with Inspector Megure. Though an excellent marksman effective at apprehending criminals alongside Megure, he wasn't considered a skilled investigator during his police career. His reasons for leaving remain unconfirmed in the manga, though the second movie suggests it involved shooting Eri in the leg to save her during a hostage crisis. Around this time, Eri moved out; they remain separated for over ten years without officially divorcing. Their daughter, Ran Mouri, persistently tries to reconcile them. Despite Kogoro's frequent flirtations with other women, he retains deep feelings for Eri, once asking her to move back in, which she declined, stating she wasn't "ready". Initially, Kogoro's detective career suffered due to laziness, poor investigative skills, and a tendency to jump to incorrect conclusions. His fortunes shifted dramatically when Conan Edogawa (the shrunken Shinichi Kudo) moved in. To investigate the Black Organization covertly, Conan began tranquilizing Kogoro at crime scenes with a stun-gun wristwatch, then using a voice-changing bowtie to imitate Kogoro's voice and present correct deductions while Kogoro appeared asleep. This method earned Kogoro the nickname "Sleeping Kogoro" and a reputation as a master detective, vastly increasing his caseload. Unaware of the manipulation, Kogoro attributes his blackouts to exhaustion from intense thinking, boasting about his detective prowess without questioning his memory gaps. Police officers like Megure find his awake deductions embarrassing and eagerly anticipate the emergence of "Sleeping Kogoro". Despite his typical incompetence, Kogoro demonstrates genuine deductive ability and professionalism when cases involve loved ones, particularly Ran or Eri. His logical reasoning sharpens significantly, and he shows a better grasp of interpersonal relationships than Shinichi. Examples include solving a case during a hot spring trip where an old college friend was murdered, and independently uncovering a murderer in Eri's hotel room during her birthday dinner. On that occasion, he remembered her birthday but mistakenly bought a gift for the wrong day due to a calendar change, leading to an awkward gift exchange where he accidentally gave her a Buddhist rosary meant for someone else. These instances reveal his underlying competence when emotionally invested. Kogoro's personality is marked by laziness, vanity, and unprofessional habits: heavy smoking, frequent drinking, gambling on horse races, and playing mahjong. He harbors an inflated sense of his detective skills and importance. He easily becomes infatuated with beautiful female clients, especially pop idol Yoko Okino, whose shows he never misses and whose merchandise fills his office and bedroom. This flirtatiousness embarrasses Ran and fuels Eri's reluctance to reconcile. However, beneath these flaws lies a strong sense of justice and compassion. He firmly rejects any justification for murder, stating he cannot understand nor wants to understand killers. He has intervened to stop criminals from suicide or further violence, shown concern for animals, defended children from unfair accusations, and occasionally displayed perceptiveness about others' feelings or situations unrelated to his usual interests. Kogoro faces personal challenges including high uric acid levels and high cholesterol. The anime depicts mild acrophobia, absent in the manga. He rarely drives, typically renting cars despite being a detective and father to a teenager. Financially, he loves money and accepts lucrative assignments, though claims he wouldn't "sell himself to the devil." His complex relationship with Eri remains unresolved, characterized by mutual care overshadowed by his behavior and their separation.