Since I'll be leaving Japan in a few months, I've decided to try to get my fill of foods I love but don't eat very often. One such food is donburi. With its many varieties, standard and modern, can one ever have too much donburi?
I'm looking in particular for the following:
any donburi with onsen tamago
But of course, any other kind of donburi recommendation (katsudon, unaju, tekkadon, etc.) will be happily received. High-end, cheap eats, anything is OK as long as it's an excellent example of its kind. I've read Tsukiji has some good donburi places--mostly seafood?
I'm looking mostly for Osaka, Kobe, Kyoto, and Tokyo recs. I don't have any plans to travel around Japan prior to leaving except for Takayama and Shirakawago (so if you have recs for those two cities, that would be great, too).
The only other qualification is that the restaurant must be easily accessed by public transportation, and it shouldn't be somewhere out of the way. For part of my quest, I'll be with my mother who has some mobility issues, plus she hates it when I drag her all the way to the middle of nowhere (she still complains about our trip to Ek Chuah in Osaka several years ago).