On sale now at Amazon: The Lame-Ass Samurai.

Badly-held sword and ninja socks not included.

This is far from the most cringeworthy “asian” Halloween costume available…

[Update: Sigh. Genghis Khan Samurai Costume (cosplaying for the other team?); Ninja Warrior Set (extra-shiny, to blind opponents when you fail your Stealth check). ]