Rai is a space opera that fuses feudal Chinese and Japanese customs with vast galaxy spanning empires and space-going societies. The story follows the life and times of the samurai Rai, and the quest of several spacefaring factions for control of territory and, of course, the Empire.

A full-scale historical drama set in the last days (the year 1574) of the Sengoku Era of feudal Japan. It is the story of the Nohara family, who has been transferred into the Sengoku Era by time warp, and a tragic love between a princess Ren Kasuga (a daughter of the feudal lord Kasuga at the Province of Musashi) and a samurai warrior Matabei Ijiri (a retainer of the Lord Kasuga). (Source: Manabu Tsuribe)