Roppongi Hills Mori Tower

"I honestly think that Roppongi Hills Mori Tower Sky Deck is the best observation deck in Tokyo. It is a 270 meters tall, 360 panoramic view open-air sky deck located in Roppongi Hills Mori Tower which also houses the Mori art Museum, a contemporary art museum featuring exhibitions that change periodically. From this Sky Deck, you are in the center of the city, and you can see everything from Tokyo Tower to Mount Fuji. The best time to go is during sunset where you can see Tokyo light up as the sun goes down. At night, you can enjoy the breeze, and the stars can be seen."

"Roppongi Hills Mori Tower is a 54-story mixed-use skyscraper. Completed in 2003 and named after builder Minoru Mori, it is the centerpiece of the Roppongi Hills urban development. It is the sixth-tallest building in Tokyo at 238 meters."