Abukuma River
Komine Castle is located on a long and narrow hill extending 500 meters from east to west, located on a bend of the Abukuma River, which forms part of the natural defenses of the site. The Shirakawa area and the Abukuma River is the on the main route between the Kantō region and northern Japan, the Ōshū Kaidō, and control of this area was of great strategic importance. The ancient Shirakawa Barrier was once located nearby.