Sandan-kyō (Japanese: 三段峡|lit=three-level gorge) is a 16-kilometer long ravine in the Nishi-Chugoku Sanchi Quasi-National Park in Akiōta, Hiroshima, in southwestern Japan. Through it runs the Shibaki River, one of the Ōta River's tributaries. Sandan-kyō is known for its autumn foliage.