I stayed in this hotel only a couple of months after it opened so everything was brand new. Rooms very large, the largest i have ever stayed for a standard room - includes a dresser room and large bathroom. Very hi-tech - internet wired/wireless was inclusive, had internet radio, includes 2 flatscreen TVs. We stayed near the top floor so had good views of the city. The lobby was quite small, felt more like a boutique hotel. Breakfast was good - we tried the lobby, the boutique cafe and the chinese restaurant (which had a western buffet).

Location is excellent, only a couple of minutes walk from the JR Yurakucho, subway Hibya station, and about 10 mins from Ginza. The Imperial Palace is less than 10 mins away.

Only minus is the high price. I have not stayed in a Tokyo hotel recently, so cannot compare, especially against the new hotels like Mandarain and Ritz Carlton. But highly recommended.

Great location, very good service, however the smell of food in the lobby is a nuisance and food options should be extended (sushi bar...)

I would jump at the chance to stay here again. The only hotels in which I have stayed in Tokyo have been the Park Hyatt in Shinjuku, the Royal Park Hotel, the Four Seasons at Marunouchi, and the ANA Intercontinental. Our experience at the Peninsula outshone all the rest. Our standard room was very large and supremely appointed. It was modern, warm, comfortable, and luxurious. I don't even think the photo on the website does it justice. I was expecting a room almost half this size. It had a foyer with a door between it and the room, a love seat, breakfast table, a chair, a king size bed, and two night stands. The bathroom was huge with two sinks.

The service was better than any of the other places we've stayed. The staff at the Park Hyatt tried to make us feel like we didn't belong, but our experience here was completely different. The pool and jacuzzi were wonderful as well. Okay, so having breakfast in the lobby wasn't ideal, but I would hardly fuss about that considering how much I enjoyed my stay at this hotel.

One not-so-great aspect - we didn't enjoy the food at Peter's. It was insanely expensive (but that's to be expected at many a Tokyo hotel) and there were a lot of ultra-modern dishes, complete with the restaurant trend of whipping certain foods into a foam. They called it "mousse," but it was foam. Some people like it I suppose, but it's a little too experimental for me. However, the wine selection, though massively over-priced, was excellent.

The Peninsula Tokyo is perfectly located at five minutes walk from the elegant district of Ginza where you'll find the best boutiques of the Japanese capital and a lot restaurants all around.
The rooms are very spacious and offer stunning views of Tokyo if you select a Deluxe category with view. In this case, you'll have a beautiful space extremly well designed of 60 sq meters with two large windows offering a breathtaking view. Beds are more than comfortable and the Peninsula touch offers the best in room technology with a valet box, a personal humidity controller and a lot of buttons for lights, windows, music, TV, nails dryer... You'll need about one day to understand the function of all buttons but all these details offer the best in term of comfort. The bathroom is one of the most exquisite i've seen with a spa touch which reduces the light and turn on a relaxing music but also, the high tech automatic toilets only japanese have the secret... Incredible!!!
Don't expect any mistake of the staff because all of them are truly excellent and perfectly trained. Moreover, don't forget they're japanese and it means there is a real devotion to the customers in their mentality. All of them are extremly smily and efficient.
Consequently, The Peninsula could be the best hotel of Tokyo if there wasn't any problem with cleanliness... A dirty directory book full of coffee and some pillows on the sofa not really clean... Moreover, when we came back on the evening, our key didn't work anymore and we have been obliged to wait more than ten minutes before somebody comes to open it, not acceptable in one of the new palace of Tokyo...
And personally, we don't like the lobby used as a restaurant for breakfast, lunch, high tea, dinner... and not really nice when you arrive with your baggage in the middle of the customers who are eating...
A last bad detail... the online reservation system which doen't give the right information about the rate if you're three...
But this is a very good hotel in Tokyo even if i'll choose an other one next time.