I did not find Nattō that bad actually. You need to spread it out over enough rice.

That said, I had a dish recently, stir fried prawn with Thai “stinky beans” that reminded me of Nattō somehow. To be fair they did warn me that it really was stinky when I tried ordering it. I insisted to try it anyway. It was really difficult to get down. It really did stink on my plate. I had to carefully ensure that no spoonful had to much of the bean mush. It was salty and gave the impression of decay.