Tattoo The Dragon King is really four dragons, and these dragons keep watch over the four main seas. They are believed to live underwater in the Ryuku islands area in Okinawa. Japanese dragons are of various types: there are the Tatsu dragons that are a representation of spirituality and imperial power and tend to live in lakes or springs. The Sui-Riu dragons are held responsible for bringing rains into the islands of Japan. The Han-Riu dragon is the tallest of the dragons measuring up to almost 40 feet in length and can reach the heavens. The Ri-Riu dragon is most popular for its unusual eye-sight which is believed to be the best. The Ka-Riu dragon which is the smallest possesses a frightening red color. The Fuku Riu is the dragon which brings luck to people. The Hai-riyo dragon is actually a dragon which possesses a bird-like shape and is the most evolved of all the dragons.