Ryōtarō Okiayu (置鮎 龍太郎, Okiayu Ryōtarō, born November 17, 1969) is a Japanese actor, voice actor and singer affiliated with Aoni Production. His major roles include Byakuya Kuchiki in Bleach, Treize Khushrenada in Mobile Suit Gundam Wing, Hisashi Mitsui in Slam Dunk, Meisuke Nueno in Hell Teacher Nūbē, Kunimitsu Tezuka in The Prince of Tennis, Zero in Mega Man X, Yuu Matsuura in Marmalade Boy, Shigure Sohma in Fruits Basket, Dark in D.N. Angel, Toriko in Toriko and Kokushibo in Demon Slayer. As a singer, he was one of the members for Entertainment Music Unit from 1995 to 2000. He is married to voice actress Ai Maeda. His range is A~E♯ and his dialect is Osa... ()