Its true, I saw a documentry about it, the Japanese weren't particularly happy with it, at that time they had neo-samurais, or as they were known to the rest of the world as wannabe samurais or just freaks, they got extremely angry, after 2 years of protest and pillaging villages, the American Massacre of `46 happened where many neo-samurais killed as many Americans as they could until they got their sushi back, but then they were taken out by the English Rugby team and us Brits were branded hero's saving USA's arse from fanatics, then the leader Charusu Manusonu (Yes, a Japanesified Charles Manson, with errors no doubt) denied ever having killing anyone, after convinced many Japanese men that he was a Shinto god who he resembled, but they couldn't imprison him so he went to America to spread his evil plot years later...
Then in 1962 the Neo-Samurais in prison soon realised they could have just gone fishing to get more sushi and hung them selves for their stupidity...but one survived who goes by the name of Seppuku...
If you're thinking WTF? Thats a good thing...I guess.