尚真王
Arata's family is the male line descendant of the Prince of Goeku in Ryukyu Kingdom, Shô Ryûtoku, the fourth prince of the King Shō Shin, the third of the line of the Second Shō Dynasty. He spent his childhood in Belmont, Massachusetts, while his father, a theoretical physicist who obtained his doctorate under the supervision of Masao Kotani (the tutor of the Emperor Akihito), worked at Harvard University under Martin Karplus (Nobel Prize in Chemistry 2013). His mother is a cousin of Yoko Gushiken, a famous Tarento in Japan and former Light flyweight boxing champion of World Boxing Association (WBA).