Ryotaro Okiayu (?? ???, Okiayu Ryotaro, born November 17, 1969) is a Japanese voice actor and stage actor affiliated with Aoni Production.
His major roles include: Treize Khushrenada in Mobile Suit Gundam Wing, Hisashi Mitsui in Slam Dunk, Meisuke Nueno in Hell Teacher Nube, Kunimitsu Tezuka in The Prince of Tennis, Byakuya Kuchiki in Bleach, Yuu Matsuura in Marmalade Boy, Shigure Sohma in Fruits Basket, Dark in D.N.
Angel and Toriko in Toriko.
As a singer, he was part of the voice actor unit E.M.U (Entertainment Music Unit) with fellow voice actors Hikaru Midorikawa, Hideo Ishikawa, Nobutoshi Hayashi and Daisuke Sakaguchi, which was active from 1995 to 2000.