Ryosuke Sakamoto (阪本 良介 Sakamoto Ryōsuke) is a Japanese actor. He played Morita in episode 7 in Kamen Rider Black. He is known for playing Shirou Gou/Red One in Choudenshi Bioman. He reprised this role in a voice-only appearance in Kamen Rider × Super Sentai: Super Hero Taisen.