The Battle of Ichi-no-Tani (一ノ谷の戦い, Ichi-no-Tani no tatakai) was fought between the offensive Minamoto clan and the defensive Taira clan at Suma, to the west of present-day Kobe, Japan, on 20 March 1184. It sat on a very narrow strip of shore, between mountains on the north, and the sea to the south.

The battle of Ichi-no-Tani was a decisive victory of the Minamato (also Genji) over the Taira clan (also Heike) in 1184 during the Genpei wars of the 12th century in medieval Japan. The epic conflict between the Minamato and the Taira clan has been a major subject in Japanese literature and arts for centuries.