Yeah, a DD carrying a gun turret that weighs as much as herself ain't gonna happen.

Don't give up, Kiyoshimo! The Lord Clive-class monitors could do it, and so can you. Heck, the HMS General Wolfe managed to carry 1×18-inch gun,
2×12-inch guns, 2×6-inch (152 mm) guns, and 2×3-inch (76 mm) guns despite being lighter than Ooyodo!

She can do it.
It's that one damned bird that broke her back

Widen her beam enough for the barbette and magazine to fit as well as lose the tubes but she'll probably be a "heavy" destroyer by that time. hey, at least she's got the offensive firepower of a BB.

A few modifications and she'll recategory as a Monitor.

So, what would happen if you put a gun that size on a ship that size?