Senjuinrikio can be dissected into singular kanji, giving a very literal, approximate meaning of "The power of the king of one thousand hands" - 千(One Thousand), 手 (Hands), 院(Institute, ruling position), 力(Power), 王(King) (せんじゅいんりきおう）. This, however, is akin to breaking up any of our English words and separating the various Latin or Germanic roots in the word and then thinking of those individual meanings literally. The name should instead be taken in two parts: Senjuin and Rikio. The Senjuin(千手院) was a "school", the oldest of 5 collectively called the Yamatoden(大和伝), of ancient Japanese katana craftsmanship. This "school" was located in the Senju valley(千手谷), in what is now the Nara prefecture(奈良県). Like the school named after the valley, so too was the katana named after the school. Fina