A new restaurant near my main workplace specializes in "Niku-sui" (肉水) but I'd never had it. It looks like (and is) beef and tofu in a thin soup, which sounds kind of "iffy" but it's actually really good! You can choose to add an egg to the soup. The set was ￥990 + an extra ￥100 for the egg

Apparently this is usually eaten with raw egg over rice, but I opted to have just plain white rice with my set. In addition to the main item & rice, the set came with a reconstituted dried daikon salad and Japanese pickles.

This was so good that I wanted to make it at home. Here is a recipe (in Japanese -- sorry!); I tried it and it's good :-)

https://oceans-nadia.com/user/153045/recipe/429233

https://preview.redd.it/l5k8fcz7cgid1.jpg?width=1921&format=pjpg&auto=webp&s=8e89a04c0786eeb32cad97ba9e850c15db7abd46