Lupin III , also written as Lupin the Third, Lupin the 3rd, or Lupin the IIIrd, is a Japanese media franchise created by Monkey Punch. The series follows the endeavors of master thief Lupin III, grandson of gentleman thief Arsène Lupin, joined by his criminal gang. The original Lupin III manga began in Weekly Manga Action on August 10, 1967.

Koichi Zenigata , usually called Inspector Zenigata and formerly Heiji Zenigata VII, is a fictional character created by Monkey Punch for his manga series Lupin III, which debuted in Weekly Manga Action on August 10, 1967. He is named after the famous fictional Japanese detective Zenigata Heiji, of whom he is a descendant.