Nicknames
Lupin often refers to Zenigata as tottsan (とっつぁん), a form of address that is usually translated as "Old Man" or "Pops" (with "Pops" used most frequently in the English dub). He is named after a famous fictional Japanese detective, Zenigata Heiji. Zenigata's ability to handcuff criminals at a distance also comes from Zenigata Heiji, who threw coins with great force and accuracy and used them as weapons to disable criminals. In Japanese, the title of inspector is keibu (警部), although an early dub of Castle of Cagliostro erroneously stated Keibu as Zenigata's first name.
In the Italian version he's often nicknamed Zazà or Papà Zenigata (Daddy Zenigata) by Lupin. The German version often calls him Zazza. The French version calls him Inspecteur Lacogne. In the Philippine dub, he is often called "Defective" Zenigata (mostly as a taunt because of his constant inability to capture Lupin). In the new Spanish dub, Lupin often calls him "Papaíto" ("daddy").
Read more about this topic: Koichi Zenigata