Consider a visit to TV Asahi and take some time to enjoy the abundant dining options during your time in Roppongi. If you want to see more of the city, jump on the metro at Roppongi Station or Roppongi-itchome Station.
Shibuya is highly notable for its popular shops, and you might want to visit top sights like NHK Hall and Yoyogi National Gymnasium. See more of Tokyo by jumping on the metro at Yoyogi-koen Station or Meiji-jingumae 'Harajuku' Station.
Spend some time visiting places like Hodoji Temple while getting to know Akasaka, and be sure to check out the abundant dining options. You can hop aboard the metro at Akasaka Station or Tameike-sanno Station to see more of the area.