This episode is a standalone "filler" caper that shifts the action from London to Brazil, centering on a legendary pirate treasure and a clever subversion of a classic heist trope.
The series is known in Italy as "Lupin III - Una storia senza fine" ("An Endless Story"). The Italian dub for Part 6 notably recast almost the entire main cast except for the voice of Jigen. LupinIIIPartVI_Ep_09_ITA.mp4
While most of Part 6 focuses on a central mystery involving Sherlock Holmes, this episode is part of a series of guest-written standalone stories. This particular episode was written by Shigeru Murakoshi , though the following episode (Episode 10) was written by the legendary Mamoru Oshii ( Ghost in the Shell ). Review: Part 6 “Episode 9 ~ The Jet-black Diamond” This episode is a standalone "filler" caper that
Fans have jokingly compared this episode to One Piece due to its focus on pirate treasure and a scene where Goemon is seen training by slicing a giant squid . While most of Part 6 focuses on a
In a classic Lupin-style irony, the "Jet-Black Diamond" is revealed to be black pepper . A century ago, pepper was so valuable that it was nicknamed the "jet-black diamond," making the "treasure" worthless in the modern day.