 He went to compete in the promotion until its closure, time in which he moved to Battlarts.Otsuka became one of the greatest Battlarts stars, feuding with Daisuke Ikeda and Yuki Ishikawa in violent matches and brawls, and being also part of the Love Warriors tag team along with Mohammed Yone.His career in the promotion was parallel to its very existence, ceasing when Battlarts folded in 1999, and doing a return when it reopened in 2002 with Pro Wrestling Zero-One's support.