TV Special
Description
Inspector Koichi Zenigata, a dedicated Interpol officer, is defined by his relentless pursuit of master thief Lupin III. This obsession drives his professional life, often resulting in significant collateral arrests that maintain his respected status despite repeated failures to permanently capture Lupin.

Zenigata possesses considerable investigative skill, frequently anticipating Lupin's plans and exposing security flaws. However, his methods often involve impulsive, head-on confrontations, reflecting a strong personal code of justice that clashes with bureaucracy or corruption. His pursuit borders on the personal, triggering emotional extremes: profound grief when believing Lupin dead, seeing it as the loss of his purpose, and intense frustration when Lupin escapes.

His portrayal varies across iterations. Early depictions show him as ruthless, violent, and occasionally corrupt, engaging in unethical exchanges. Later portrayals, including most TV specials and the "Red" and "Pink" series, soften him into a more affable, hot-tempered, and comically single-minded figure. He displays surprising sensitivity, readily crying when Lupin shows him kindness or when confronted with tragedy.

In "Voyage to Danger," Zenigata faces a personal crisis after removal from the Lupin case and reassignment to investigate the arms smuggling group Shot Shell. This demotion triggers severe depression, manifesting in heavy drinking and temporary abandonment of duty. His despondency is so deep he briefly collaborates with Lupin and his gang, performing uncharacteristic menial tasks. This collaboration stems from Lupin's decision to dismantle Shot Shell for him, aiming to restore Zenigata's purpose. His removal also leads Interpol to assign the ruthless mercenary Keith Hayden to assassinate Lupin, a tactic Zenigata explicitly disavows due to his commitment to capturing Lupin alive.

Beyond this incident, Zenigata shares a complex dynamic with Lupin. They maintain an unspoken understanding avoiding lethal force, and Zenigata occasionally forms temporary truces with Lupin to confront greater threats. Periods believing Lupin dead have led to drastic actions, including temporary retirement and becoming a monk. His personal life is largely sacrificed for his pursuit; references to a wife or daughter are inconsistent and seldom explored, with Zenigata often stating he has no family.

Physically robust, Zenigata is proficient in judo, karate, and marksmanship. His signature weapon is a set of handcuffs attached to a rope, thrown with remarkable accuracy. He also occasionally uses a jitte and a Colt M1911 pistol. His subconscious drive enables extraordinary feats of endurance and focus when Lupin is involved.

Zenigata's lineage connects him to the fictional Edo-period detective Heiji Zenigata. Early material identified him as Heiji Zenigata VII, though this blood relation was later downplayed, solidifying "Koichi Zenigata" as his primary name. He serves as Lupin's institutional rival, embodying the persistent force of law.