The Saikaidō (西海道, "western sea circuit" or "western sea region") is a Japanese geographical term.[1] It means both an ancient division of the country and the main road running through it.[2] Saikaido was one of the main circuits of the Gokishichidō system, which was originally established during the Asuka period.
^Compare Nankaidō, which includes all of Shikoku, is the "southern sea circuit" and Tōkaidō is the "eastern sea circuit", made famous by the wood-block prints of Hokusai and Hiroshige.