The series is set in the 1960s. Lupin III made his debut in August 1967.
Toshio Furukawa, who voices Lupin II, had previously voiced Arsene Lupin III in Lupin III: The Fuma Conspiracy (1987).
Though Lupin is shown having 1950s style pompadours in his teenage years shown in Part 2, the show follows along with the suggestion in Part 2 that he was born in the 1950s; Part 2 Episode 54 shows a flashback set in 1968, and in Part 2 Episode 50, Lupin meets Cornelia in the early 1970s.