Cafe Mozu
Café Mozu (web site), 1330 Maryland Avenue SW, Hotel Mandarin Oriental, “Set at the heart of the US capital between Maine and Maryland Avenues and 12th and 14th Streets, SW,” (Metro Trip Planner - opens in new window) [Washingtonian | WaPo | City Paper | food-plan | openlist]
Expensive, but the seafood is of high quality. Some of the sauces are a bit sweet. Probably the best Pan-Asian place around, but it is two huge strikes against it. 1) If I am in that hotel, and inclined to spend money, I am headed to CityZen, and 2) a bowl of DanDan noodles, at TemptAsian, for $4.95, offers more pleasure than a Pan-Asian meal at any of these places.