Inspector Koichi Zenigata

Koichi Zenigata (銭形 幸一 Zenigata Koichi), usually called Inspector Zenigata (銭形警部 Zenigata-keibu) is an incredibly talented, yet often bumbling police officer who has made it his life's goal to capture Lupin III.

Though sometimes seen as a bumbling fool, Zenigata is in fact a consummate master detective, able to ferret out exactly where Lupin is and what he might be planning next. Skilled in judo, karate, and often attached a squad of skilled officers, Zenigata joined ICPO (Interpol in the English translations) in order to bring Lupin, the only criminal he's yet to arrest, to justice.

Despite being Lupin's chief antagonist, Zenigata has a begrudging respect for the thief, and is the only man on Earth capable of understanding Lupin's goals and actions. His respect for him even goes so far that he considers himself the only man who has the capability and the authority to arrest Lupin. In some instances where he is left to assume that Lupin is dead, Zenigata loses his purpose in life; in fact, in accordance to the proverb "It's not the having, it's the getting" the perpetual hunt for Lupin is the only thing which gives him a reason to live. On occasion, he and Lupin also end up actually helping each other when they have a common cause.