I am usually not too keen on staying in the Shinjuku business district area since it is not a particularly walkable area of the city, but given the quality of our stay at the Park Hyatt I will definitely consider staying there again!
Great stay, great room, great service, absolutely no complaints!

Feels like a boutique hotel and the children very welcome.
After a day running around Tokyo go with the children to the fabulous swimming pool to unwind was great!

The breakfast is expensive compared to the quality

I couldn't fault a single thing from my stay here. The views from our room (Deluxe King) and all of the restaurants were spectacular - could see Mt Fuji on most mornings. The room was very spacious and well appointed. The service was impeccable. The breakfast that was included was of a very high quality. Will definitely be staying here again, and think that for the price paid was very good value.

This hotel is, simply put, the height of luxury, service and style. Perfect for either business or leisure. I cannot imagine having a poor stay in this hotel. You'll wish your trip was a few days longer just so you could enjoy the hotel for a few more days. The only sad part is checking out and seeing your bill, which will undoubtably be large - but in my opinion very worth the experience that you get.

Upon arrival at around 11PM from a Trans-Pacific flight, I was greeted at the entrance of the hotel and accompanied up the elevator to the lobby, then immediately walked up to my room and checked-in inside my room. My stay was a week, and I was offered a choice of a mid-week gift (bottle of sake, champagne or wine) which was a really nice touch.

The service is consistently exceptional, from housekeeping to the front desk and especially the staff at the entrance who will help you get into a taxi and get you to where you need to go. The rooms are tastefully decorated and feel modern with a minimal, almost muted Japanese touch.

The views from everywhere in the hotel are stunning. You'll wake up with a view of Shinjuku skyscrapers, walking through the lobby and see Mt Fuji on a clear morning, and get a drink in the New York Bar watching the flashing red lights of Tokyo at night. Also a nice touch - hotel guests don't have to pay cover to get into the New York Bar on weekends, and if there's a wait for a seat they will call your room when it's ready rather than making you wait in the bar lobby. I would recommend going up to the bar on weeknights as it's less crowded and touristy than on the weekends.

The amenities are top notch, with insanely comfortable beds and pillows and awesome Aesop products in the bathroom. (I definitely called housekeeping and requested extra toiletries to take with me!)

The only downside of the hotel that I can think of is the location. It's a tad inconveniently located, in the business section of Shinjuku, but by no means difficult to take a quick cab or train to any other part of the city. Also, there are few dining and drinking options close to the hotel that aren't in the hotel. OK if you're on an expense account since the dining and drinking options in the hotel are top notch, but these options are very pricey for anyone staying for personal holidays. Also... to be honest the room service breakfast was a bit lackluster - they just couldn't get the eggs right, which is disappointing when it costs nearly $50 for the Western-style breakfast.