Ryohei Yamamoto (?? ??, Yamamoto Ryohei), born December 30, 1974 in Kyoto) is a Japanese R&B singer, also known as just Ryohei.
He debuted as "????" (written in kanji) under Warner Music Japan on 2003 with single "Almost There".
Prior to that, on November 2002, he was featured on a track "Why Not?" by Fantastic Plastic Machine.
In 2006 he shortened his name to just "Ryohei" (written in Roman letters) and transferred to the label Rhythm Zone.
He is known for his collaborations with m-flo, being featured on tracks such as "Miss You" and "Summer Time Love".
Ryohei is one of the most popular artists on iTunes Japan with his latest single 'So Fly' reaching #1.