The Yamato is one of my favorite battleship. She was an awesome unit for her time. She put up a valiant fight but was uselessly sacrified.
As a model she is of course available in 1/350 with Tamiya and Trumpeter
In 1/200 (1,30M) she is made by Nichimo as a complete plastic kit
in 1/96 ( 2,7m) she is availabe as semi kits (Hull + running gear + fitting and maybe some decks + superstructure + turrets) from scaleshipyard in the US and fleetscale in UK. need to count a basic budget of 1500 USD.
Should I go to Japan one day, I would dream to go to Kure and see her. regretfully, this model seems to be static. would have been a powerful sight on the water.