The Bar/Lounge at Marunouchi Hotel
The bar/lounge at Marunouchi Hotel is referenced by expert writers. Of the 8 reviews tracked on TripExpert, 2 recommended the bar/lounge, such as Frommer's and DK Eyewitness.
Marunouchi Hotel 
Frommer's
DK Eyewitness
Frommer's "Occupying the top 11 floors of the Marunouchi Oazo glass high-rise, it exudes an almost Zen-like solemnity, with bare wooden floors and shoji-like walls in a lobby that overlooks a rooftop garden that seems almost surreal"
DK Eyewitness "The higher floors and bars offer great views over the nearby Imperial Palace and business districts"
