The pass, located on the ancient
Tōkaidō highway, was first described in the 8th century anthology ''
Man'yōshū''. This pass served as the border between
Sagami and
Suruga provinces, as well as the main entrance to the
Kantō region in
Japan. A checkpoint was built in 899, and castle was built in the 16th century, both of which are no longer standing. ==Access==