Equipped as standard main guns for all Japanese heavy cruisers. Initially it was developed as the 20.0cm single mount (as seen on early Furutaka-class cruisers) but was later modified to fit 8.0 inches (20.3cm). "'' | Equipped as standard main guns for all Japanese heavy cruisers. Initially it was developed as the 20.0cm single mount (as seen on early Furutaka-class cruisers) but was later modified to fit 8.0 inches (20.3cm). "'' |