Movie
Description
Inspecteur Gaston Lacogne is the French name for the character originally known as Koichi Zenigata, a determined police inspector who serves as the persistent pursuer of the master thief Arsène Lupin III. In The Castle of Cagliostro, Lacogne is a Japanese officer working for the International Criminal Police Organization, also known as Interpol. His full name is Kōichi Zenigata, and he is described as being in his late forties to mid-fifties, standing approximately 181 centimeters tall, with black hair and a square-jawed, muscular build.

The character is defined by an all-consuming dedication to his work, having made it his life's singular mission to capture Arsène Lupin III. This obsession is such that his personal life has been put on hold, leaving little room for family or romantic relationships. Lacogne can be impulsive and temperamental, yet he possesses a strong sense of professionalism, as shown when he maintains his composure in the face of the Count of Cagliostro's rude and racist treatment. While he is a highly talented and competent investigator, his zealous pursuit often leads him into bumbling or comical situations, a dynamic that has been compared to a human version of Tom and Jerry. Despite his gruff exterior, he is a sensitive man who can be moved to emotion, particularly when it concerns Lupin, and he shows respect for the dead, as seen when he prays for the soul of a fallen Japanese spy.

In The Castle of Cagliostro, Lacogne's primary motivation is to apprehend Lupin III, having been drawn to the Duchy of Cagliostro by a notice the thief left behind. His role in the story evolves from that of a simple pursuer to a crucial, if temporary, ally. Initially suspicious of the Count's excessive security measures, Lacogne is outmaneuvered by Lupin and falls into a dungeon beneath the castle. Trapped together, the inspector and the thief form an uneasy truce to escape the catacombs, where they discover the Count's secret counterfeiting operation. Lacogne secures evidence of the crime, and together they set a fire as a distraction, eventually commandeering the Count's autogyro. After escaping, his efforts to convince his Interpol superiors to act are initially rebuffed due to the Count's political influence. However, he later collaborates with Fujiko Mine, staging a dramatic live-televised raid that exposes the counterfeit money operation to the world, leading to the Count's downfall.

The core relationship is his rivalry with Lupin III, whom he affectionately calls Pops. This is not a simple enmity but a complex bond of mutual respect and unacknowledged friendship, as circumstances force them to cooperate for survival. Lacogne's interactions with the film's antagonist, the Count of Cagliostro, are characterized by the Count's condescension and xenophobia, which Lacogne endures professionally while growing increasingly suspicious. He also works alongside Fujiko Mine, tentatively trusting her information when it aligns with his goal of capturing Lupin, even though she is a criminal. His development in the film reveals a man who, while obsessed with his quarry, is fundamentally dedicated to justice. He is willing to put his personal mission aside to expose a greater evil, demonstrating that his sense of right and wrong can override his pursuit of Lupin.

Notable abilities include his skill with a handgun, specifically a Colt Government M1911 A1 automatic pistol, and his trademark proficiency in throwing handcuffs with great accuracy to restrain a target. He is also a competent if often frustrated pilot, capable of managing the Count's autogyro in a crisis. His physical strength and determination are evident in a fistfight with the Count's henchman, Gustav, and he carries a jutte, a traditional Japanese truncheon, as an echo of his famous ancestor, the detective Heiji Zenigata.