Ryohei Otani (大谷慶彦, Ōtani Ryōhei, born October 1, 1980) is a Japanese actor and model. He began his modeling career in Japan, then entered Korean entertainment by being featured in a commercial for Dunkin' Donuts in 2003, followed by Hyundai Motors, Olympus and SK Telecom. His popularity helped him land roles on television, beginning with the 2006 sitcom Soulmate. Otani's acting career continued to be active in South Korea, starring in television dramas such as The Road Home, Dear My Sister, Hero, and The Chaser, as well as the period blockbusters War of the Arrows and The Admiral: Roaring Currents.