Former Japanese Navy Underground Headquarters 旧海軍司令部壕

Historic site

The Former Japanese Navy Underground Headquarters is open every day. From October to June, it operates from 8:30 to 17:00, and from July to September, it is open from 8:30 to 17:30. A visit to the museum and tunnel complex typically takes 30 to 40 minutes.

Source: kaigungou.ocvb.or.jp ↗, read 2026-09-11

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