| Tokyo Bay Fortress | |
|---|---|
| Tokyo Bay, Japan | |
 No.1 Kaiho(1974) | |
| Type | Defensive fortification |
| Site information | |
| Controlled by |  Empire of Japan |
| Condition | ruins |
| Site history | |
| Built | 1884–1945 |
| Materials |
|
| Demolished | 1946 |
| Battles/wars | World War II |
| Garrison information | |
| Occupants | Imperial Japanese Army |
Tokyo Bay Fortress (東京湾要塞, Tokyo-wan yosai) was the name of a group of coastal fortifications built to guard the entrance to Tokyo Bay and thus the city of Tokyo from attack from the sea. These gun batteries and fortifications ceased to be used after the end of World War II.