Actor Sho Kosugi, who became famous during the 80's for making tons of ninja movies, and his son Kane Kosugi did the motion capture for Rikimaru and Onikage respectively.
Banned in Germany (31.03.99)
Tenchu: Stealth Assassins was voted #54 in the Top 100 Games of All Time poll published by Game Informer Magazine (Issue 100, August 2001).
Before the U.S. (text and voices in english) version was released, there were some pirate copies of the japanese version circulating with the title 'Ninja Condemned By God' printed on the booklet cover. There are some differences between the U.S. and Japan versions; one example is the animated sequence for the first boss and his bodyguard.