From: Somewhere in the South Pacific.
I think that the terms of battleship, fast battleship, and battlecruiser are just superficial national designations. Because the Japanese rated the Kongo's as fast battleships, other navies may well have designated them something else to fit their own tactical/political purposes.
The same could be said of the Scharnhorst, which the Germans rated as a small battleship, while the British actually termed them as battlecruisers. Then lastly we have the Iowa's, which were rated as fast battleships by the USN. But if they had of served in the RN, would have been designated as battlecruisers because of their speed.
When you see the Southern Cross, For the first time
You understand now, Why you came this way