Sean (15th Dan Bujinkan, Kosen Judo 3rd Dan) lived in Japan for ten years (1991-2001), where he spent time training under Hatsumi Sensei and the Bujinkan Shihan. He also graduated from Sophia University with a degree in Japanese Language & History, and a minor in Japanese Religions during his stay in Japan. His martial background includes Bujinkan Budo Taijutsu, Kosen Judo, and shootfighting. Sean taught from his Bujinkan Kokusai Renkoumyo while living in the US from 2001 through 2006, at which time he moved back to Japan and settled in China. In 2011, he moved to Chicago, IL.