Ep. 36: Lupin and his gang attempt to decode the treasure hidden within Tsukikage Castle.
Aired on June 12, 1978

Significant wealth is concealed inside Tsukikage Castle, prompting Lupin and his associates to solve a complex code to locate the prize. Their efforts are complicated by the Fuma Ninja Clan, who are simultaneously scheming to seize the riches for their own purposes. The narrative focuses on whether Lupin can successfully interpret the puzzle and secure the treasure before his competitors manage to do so first.
Episodes
- Ep. 32 · Lupin faces a deadly long-range assassin in a close-quarters confrontation that ends with him shot.
- Ep. 33 · Lupin pursues a stolen crown at a deceptive black-market auction.
- Ep. 34 · Lupin faces Camilla the vampire after excavating a two-thousand-year-old casket containing her and a golden Virgin Mary statuette.
- Ep. 35 · Lupin's African Heist Goes Awry When Gorillas Steal the Black Pearl
- Ep. 36 · Lupin and his gang attempt to decode the treasure hidden within Tsukikage Castle.
- Ep. 37 · Lupin and Goemon search for buried treasures in Mongolia
- Ep. 38 · Lupin faces capture as Fujiko trades his arrest for a clean criminal record.
- Ep. 39 · Lupin infiltrates a Hong Kong smuggling operation involving thousands of chickens and missing diamonds.
- Ep. 40 · Lupin intercepts a missile carrying Costa Rican diamonds while Inspector Zenigata is mistaken for the stolen suitcase contents.