Tập 5: Lupin rơi vào bối cảnh Nhật Bản thập niên 1930 khi bị Namikoshi và Akechi truy đuổi vì là tên trộm Golden Mask.

Lupin is caught in a flash of blinding light and finds himself in Showa era Japan circa 1930. He finds that he is the thief "Golden Mask" being pursued by Inspector Namikoshi who looks like Zenigata. "Golden Mask" sets his sights on a national treasure from the Imperial Museum but he must contend with private detective extraordinaire, Kogoro Akechi and the "Black Lizard", who resembles Fujiko. "Black Lizard" has been hired by Colonel Daidoji, assisted by a Major who resembles Jigen and is armed with a Model 14 Nambu Pistol. Meanwhile, Ruriko Shigetomi, heiress of the Shigetomi department store, has recovered a centuries old automaton clock from Inner Mongolia and is transporting by train to Tokyo, assisted by the knife-wielding Sarantuya, whose family have protected the clock for generations. Lupin fails in his attempt to steal the clock on the train, and it is placed on display at the Shigetomi department store. While trying to solve the mystery of his Golden Mask identity, Lupin breaks into the department store where he encounters Ruriko, but they are suddenly interrupted by a slash from the sword of Goemon Ishikawa. (Source: Wikipedia)

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