Uncovered in 2015 in the mountains of Kumamoto, this once-hidden network of underground bunkers served as a clandestine facility for the Imperial Japanese Navy during the final stretch of World War II. Visitors can explore fascinating subterranean corridors that were designated for torpedo manufacturing, command centers, and an ingenious operation to distill aviation fuel from local pine roots. Paired with insightful above-ground exhibitions, the museum offers an evocative, atmospheric journey into wartime history.
- Military History
- Museums
- Naval History
- World War II
- Historical Sites
- Tunnels
Swipe more in Kumamoto
tryJP is a swipe deck for Japan places — save spots you like and plan a route.
Open tryJP