Lupin III: Part II Season 4 Episode 28 English Subbed Episode Title:Two Goemons - the Mystery of Zantetsuken.Episode Description:A nationwide warrant is out for Goemon, who not only robbed a bank but also stabbed a security guard to death. The Zantetsuken in Goemon's hand has none of the blood-clouding on the blade that would indicate stabbing a person. This is the work of Goemon's archenemy, Nidaemon. There are two Zantetsukens, a male and a female variety. According to tradition, unless the two blades lay together once every 300 years, the larger, male blade will lose its potency. This time is Midnight straight up.