Marc M.
Google
This is probably my favorite Japanese restaurant in Tokyo. The execution is flawless and the ingredients that they use are ultra-premium. They don't have a menu and what they serve changes with the seasons, if you have food allergies or are not willing to eat everything you are served I would not recommend this place. Also, you should expect to pay about $400 per person (they only accept cash). To get a reservation you'll most likely need to get an introduction from a regular at the restaurant, and even then it's best to book a table a few months in advance.