- youtube.com watch
- en.wikipedia.org Ryōtarō Okiayu
- manga.fandom.com wiki/Ryōtarō_Okiayu
- myanimelist.net People Okiayu, Ryoutarou
- shikimori.one people/177-ryoutarou-okiayu
- kinokopilka.pro people/35144-okiayu-ryotaro
- behindthevoiceactors.com Ryotaro-Okiayu/Bu sayfanın açıklaması webmaster tarafindan gizlenmiştir.
- animego.org person/267-ryoutarou-okiayu
- imdb.com name/nm0645636/
- kinogo.uk actors/80204-retaro-okiayu.html