TV-Series
Description
Inspector Koichi Zenigata is a fictional character who serves as the persistent arch-rival and primary antagonist to the master thief Arsène Lupin III. Hailing from Japan, Zenigata originally worked as an inspector for the Tokyo Metropolitan Police Department. His first encounter with Lupin III occurred during a pursuit in New York, which left such a profound impression on him that he left the Japanese police force to join Interpol, dedicating his career to capturing the elusive thief.

Zenigata has made capturing Lupin III the singular mission of his life. While he is also tasked with apprehending Lupin's associates, including Daisuke Jigen, Goemon Ishikawa XIII, and Fujiko Mine, his focus narrows almost exclusively to Lupin whenever the master thief is present. This obsession defines his existence to such an extent that he has sacrificed all personal relationships and is unable to settle down, as the chase leaves no room for anything else. On the rare occasions when Lupin appears to have died, Zenigata experiences a profound existential crisis, losing his purpose in life; in one story, he even retires to become a monk, believing he must pray for Lupin's soul in the next life. Because his identity is so tied to the pursuit, he is never particularly displeased when Lupin escapes, as it means the hunt will continue.

The dynamic between Zenigata and Lupin is far more complex than a simple hero-villain rivalry. The two share a deep, unspoken mutual respect that borders on friendship, a concept Zenigata is extremely reluctant to acknowledge. Zenigata is often awed by Lupin's genius and believes that no one else has the right to capture or kill his quarry; that privilege belongs to him alone. This attachment is reciprocated by Lupin, who has avenged the inspector on multiple occasions when Zenigata was believed to have been killed. An unwritten understanding exists between the pair that neither will attempt to cause the death of the other, and they have occasionally set aside their rivalry to work together against a greater threat. Despite this bond, Zenigata remains a highly sensitive and emotional person, often weeping openly when Lupin shows him an act of consideration or when he is relieved to discover the thief is alive after fearing the worst.

Though sometimes perceived by others as a bumbling fool due to his obsessive and headstrong nature, Zenigata is in fact a consummate and highly capable detective. His dedication has inadvertently led to the arrest of countless other criminals, which is a primary reason Interpol tolerates his single-minded focus and repeated failures to secure Lupin permanently. He possesses formidable physical abilities, including proficiency in judo and karate, and is a skilled marksman with his preferred weapon, a Colt M1911.45 caliber pistol. His signature technique is an almost superhuman skill with throwing handcuffs, which he hurls in a bola-like manner to ensnare his targets from a distance. He also demonstrates skill with a jitte, a traditional Japanese weapon.

Zenigata's physical prowess is amplified by his obsession. When his quarry is near, he can perform seemingly impossible feats, such as breaking down reinforced doors or recovering from injuries that would incapacitate a normal person. In one instance, the mere mention of Lupin's name was enough to wake him from a coma after a near-fatal gunshot wound, and he has been shown to resist tranquilizers that would knock an elephant unconscious for thirty minutes. Throughout the various anime series and films, Zenigata has shown notable development. Early depictions portrayed him as a more corrupt, violent, and opportunistic officer, but over time he mellowed, becoming the more lovable, awkward, and principled character for which he is widely known. His appearance is similarly iconic and consistent: a tall man with a long face and a bulky chin, usually dressed in a brown trench coat and fedora.