These are the updated errata, clarifications and house rules for Samurai and Katana. They've been collected from Tilsit and Clash of Arms, various websites and extensive playtesting with the Florida Suncoast Gamers. I hope they are useful to you.
PS - Discovered a small error after posting. Under House Rules, add that the Eliminated player also gets 5 cards along with 5 Samurai and 4 koku.