Very popular restaurant in the Nihombashi area. Cash only. Foreigner staff. English menu. I had the "matsu" donburi for 2200 JPY after waiting 30 minutes in line.

I will admit I am not quite sure how to rate this. On one hand, this is a very interesting culinary experience. The tastes are all very strong, but they somehow interact very well like a carrousel of flavors in your mind. Sometimes the crab comes strong, sometimes it is the urchin, sometimes it is the ikura. This gets complemented by the soy sauce that is given mixed with egg yolk, to help give more power to all falvors. To further the experience, you can have sea bream soup ("taidashi") poured into the rest of your rice, where you top up with some sashimi to have an ochadzuke additional experience. The sea bream soup ("taidashi") is already rich in flavor, but it is complemented with some citrus add-ups that bring further stimuli to the senses. When you considering all that, it feels like it is undeniably a great culinary experience. However, that being said, I can't help but to also think that this is a great culinary solution to handle left over of top ingredients in a way that it's still very interesting. When you see them preparing the dish, you can see that the bulk of it is already blended together in some kind of paste, which is topped by the ikura and the urchin ("uni"). Because of that, the serving is somewhat industrial and the name of the game is rotation. You are expected to eat and leave, so that the line can move on. When considering this latter perspective the experience feels a little bit less magical. Conclusion is that it is worth eating it if the wait is not too long, like 30 minutes or so, but not worth waiting more than 1 hour.