Career
He plays as a flanker. In 2004, he obtained Japanese citizenship. Oto plays for Toshiba Brave Lupus.
He has 12 caps for Japan, with 4 tries scored, 20 points in aggregate, from 2001 to 2007.
He was present at the 2007 Rugby World Cup, playing a single match, in the 91–3 loss to Australia. He has been absent from his National Team since then