Hama Okamoto (ハマ・オカモト, born 12 March 1991) is a bass guitarist and member of the rock band Okamoto's from Tokyo.
He is represented with the agency Sony Music Artists.
He is the eldest son of Downtown's Masatoshi Hamada and actress Natsumi Ogawa.
His real name is Ikumi Hamada (濵田 郁未, Hamada Ikumi).