S1·E5 The Coming of Goemon the Thirteenth

Goemon Ishikawa XIII is the thirteenth direct descendant of the famous samurai highwayman Ishikawa Goemon. Goemon's mentor has given him a mission; find Lupin and use the invincible Zantetsuken eliminate him. Neither Goemon nor Lupin know that Goemon's mentor and Fujiko are actually working together.