Movie
Description
Inspector Koichi Zenigata is a fictional Interpol agent of Japanese origin, initially serving with the Tokyo Metropolitan Police Department before transferring to the international body specifically to pursue the master thief Lupin III. His ancestral lineage is said to connect him to the fictional Edo-period detective Zenigata Heiji, creating a perceived generational duty to capture Lupin, a grandson of the gentleman thief Arsène Lupin.

Within the narrative of The Mystery of Mamo, Zenigata functions as the persistent, dogged law enforcement adversary whose entire existence has become defined by the singular goal of apprehending Lupin. His background in this specific film includes a brief mention of a daughter named Toshiko, a familial detail that is not explored further and remains an outlier in his otherwise career-dominated personal history. This reference serves to highlight how his obsessive pursuit has eclipsed his family life, a condition further emphasized by his consistent inability to form lasting romantic attachments or settle down.

Personality-wise, Zenigata exhibits a complex duality. On the one hand, he is a competent and physically formidable officer, respected for his judo and karate proficiency as well as his reliable marksmanship with a Colt.45 pistol. He is capable of superhuman feats of endurance and focus when on a chase and has invented specialized tools, such as unbreakable handcuffs, in his efforts to ensnare his quarry. On the other hand, he is highly emotional and often prone to tears, particularly in situations involving Lupin. This sensitivity manifests as genuine grief when he believes the thief has died, partly from personal sorrow and partly because the loss removes his life's purpose.

His role in the story is driven by motivations that extend beyond simple duty. While he genuinely believes in justice and has a track record of apprehending other criminals, the chase for Lupin has become an end in itself. Zenigata is never truly satisfied when Lupin is captured, as the thrill of the hunt is what gives his life meaning; conversely, an escape merely ensures the pursuit will continue. This is vividly illustrated in The Mystery of Mamo by his reaction to what he believes is Lupin's corpse: rather than displaying the profound grief seen in other adaptations, he gleefully prepares to drive a stake through the body, only for the object to be revealed as an exploding dummy, much to his chagrin. This moment encapsulates the unique, combative, and almost ritualistic nature of their rivalry in this particular film.

The key relationship between Zenigata and Lupin transcends a traditional criminal-policeman dynamic. While sworn enemies, an unspoken bond of mutual respect and dependence exists. Zenigata’s obsession borders on the personal; he reacts with outrage when other parties threaten to kill Lupin, believing that only he has the right to capture the thief. Lupin, for his part, often greets Zenigata with mock affection and has on other occasions saved the inspector's life, suggesting that he values their adversarial relationship as much as Zenigata does. This is not a friendship in the conventional sense, but a profound, symbiotic connection where each defines the other's role in the world. His relationships with other characters, such as Fujiko Mine, are defined by deep mistrust, though he is not entirely immune to her manipulations.

Zenigata’s development across the franchise shows a general mellowing from a more ruthless character in early manga appearances to the more comedic, sympathetic figure seen in much of the anime. In The Mystery of Mamo, this portrayal leans into his obsessive and slightly unhinged qualities, showing an inspector whose dedication has crossed into a personal vendetta that he cannot imagine living without. His notable abilities are consistently on display, including his signature move of throwing handcuffs like a bola to immobilize suspects and his extraordinary tenacity, which allows him to survive and continue chases that would exhaust ordinary individuals.