This is the list of Empire of Japan coastal fortresses in existence during World War II. Fortresses on Japanese archipelago 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.

• 36th Fortress Engineer Regiment

• Kanji Ishiwara: Commanding Officer Maizuru Fortified Zone
• Teiji Imamura: Commandant Tsushima Fortress
• Koji Chichiwa: Commandant Iki Fortress