No hotel can be all things to all people. But to score a 5, a hotel should know what it's target is, and should hit it bullseye. The Westin Tokyo does that.
I'm a frequent visitor to Tokyo, and even that experience does not make Tokyo an easy place for a non-Japanese speaker. There are other nice western-flavored hotels in Tokyo, the Westin certainly isn't the only one (and it is not the lushest of them).
But here's what the Westin has going for it:
1. Value: The Westin, by Tokyo standards, is a deal. Obviously rates vary, but I've often paid more at comparable hotels for less.
2. Rooms: lovely. Not over the top or modern-slick in any way, but all the right comforts, including multiplug electric. (Don't come expecting stark / clean Japanese design style-- that's not the Westin's style).
3. Here's the big one: EXCELLENT CONCIERGE. When you're a gaijin (foreigner) in Tokyo, you need help finding things and getting around. I can honestly say that in all my travels, I have never encountered a concierge desk that so consistently exceeded my expectations. Example: every restaurant I booked, they prepared a package for me containing Japanese language map and directions (for a taxi driver, if I was to take a taxi), and English language map and directions (for me, using the subway). Sure, most hotels would provide this information if you ASKED for it, but every request I made of the Westin's concierge people was met with similar forethought-- (handing a Tokyo taxi driver English map and directions is about as useful as handing me a Japanese subway map, and they did not want to take chances). It's just a small example, but so emblematic of everything they did for me during the week.
ONE NOTE ABOUT THE POOL: It's not in the hotel, but in an adjacent health club. It's fine for a serious lap swimmer, but it's not very convenient, it's run with a rules-heavy-hand (ie bathing caps, one-way swim lanes, etc. etc. etc.), and it would be a definite downer if you were traveling with kids expecting a cooling dip in the pool. I can't say they are prohibited, but they would surely stretch the limited sense of humor of the pool's overseers.
All in all, this recent visit made me slightly regretful that for many years, I've wandered from five star hotel to five star hotel in Tokyo, liking them all but loving none of them. . . I could just have stayed at the Westin.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.