List of Army Fortresses in Japan

List of Army Fortresses in Japan proper. These fortresses were led by the Commander of the Japanese Metropolitan Fortification System whose headquarters was in Tokyo Bay Fortress. The rest of exterior fortress system in the Provinces was managed in their respective Army or Navy command organizations.

Chisima

 * Kita Chisima Fortress
 * Minami Chisima Fortress

Karafuto

 * Karafuto Fortress

Hokkaidō

 * Tsugaru Fortress
 * Soya Fortress
 * Hakodate Fortress
 * Sapporo Fortress

Central Japan (Honshū)

 * Maizuru Fortress
 * Yura Fortress
 * Nagano Fortress

West Japan (Honshū)

 * Tokyo Bay Fortress
 * Anami Oshima Fortress
 * Funauke Fortress
 * Nakajo-Wan Fortress
 * Iki Fortress
 * Hoyo Fortress
 * Nagasaki Fortress
 * Sasebo Fortress
 * Shimonoseki Fortress
 * Tsushima Fortress
 * 60th Fortress
 * 61st Fortress
 * 65th Fortress
 * 66th Fortress

Army unit attached to the Fortress system

 * 36th Fortress Engineer Regiment

Army Commanders in Fortress system

 * Kanji Ishihara: Commanding Officer Maizuru Fortified Zone
 * Teiji Imamura: Commandant Tsushima Fortress
 * Koji Chichiwa: Commandant Iki Fortress