Ryoutarou Okiayu (置鮎龍太郎), born November 17, 1969, in Kitakyushu, Fukuoka, Japan, is a voice actor who played Tiger's Eye in the SuperS season of the Sailor Moon anime, along with some minor roles in other seasons. He has performed many prominent anime roles, including Tezuka Kunimitsu in The Prince of Tennis, Yuu Matsuura in Marmalade Boy, Treize Kushrenada in Mobile Suit Gundam Wing, Katsuhiko Jinnai in El-Hazard, Hisashi Mitsui in Slam Dunk, Byakuya Kuchiki in Bleach, Hiroto Honda in Toei's Yu-Gi-Oh! anime, Aoi Rokushou in Naruto, Sakisaka in .hack//ROOTS, Scar in Fullmetal Alchemist, Brad Crawford in Weiß Kreuz, and Vincent Bari and Seitaro Takamine in Konjiki no Gash Bell!!.
- He was married for a while to Naomi Nagasawa but they have since divorced.