Shigure: 1685 tons standard displacement Yamato: 62,315 tons standard displacement 46cm/45 Triple Gun Mount + Turret + Barbette: 2,774 tons
She weighs a bit less than half of one of three of Yamato's main battery mounts and still lifts and throws her...not even the Nagamonster is that stronk.
Edit: wow the IJN designers did good work: in the short space between the Fubukis (all three types) and the Shiratsuyus they managed to shave off 405 tons taking them from 2090 to 1685 each while only trading one 12.7cm/50 gun (F:3x2 S:2x2, 1x1) for two extra torpedo tubes (F:2x3 S:2x4) and gaining an extra 1000 miles range for the same fuel load.