>>13068039Let's assume for a moment that through ridiculous amount of engineering and research you design all the organs, muscles and bones out of new materials that can, somehow, keep up with the square cube law. Oh, and also you make sure that the brain of the creature is actually capable to deal with inertia and all that mass being moved around. And a shitton of other minor problems.
And then you will do all this you will finally stand before the ultimate question - how the fuck do you feed this thing? Basically no matter what it will do the kaiju will expend more energy than it will get from any amount of food. At best, you could hope that when stationary and food being carted directly into its mouth it will be able to stay alive and even that is doubtful.
The only "realistic" kaiju needs fucking force fields or godlike control over magnetic fields and using a miniature black hole as its stomach to convert matter to energy.