Two Heavens One Style

二天一流 is a fighting style developed by Miyamoto Musashi in the 17th century that uses both the long and the short sword. 二天一流 literally means "Two Heavens One Style" and is composed of the kanji 二 (read ni) meaning "two", 天 (read ten) meaning "heaven, sky", 一 (read ichi) meaning "one", and 流 (read ryuu) meaning "style".