Using Tokyo Metro is the best way to get around the city, and the most economical option is to purchase a two-day Tokyo Subway Ticket for 1200 yen or a three-day ticket for 1500 yen. Taxis are also available but can be expensive, so it's best to use for short distances. Allow for extra time travel times as Tokyo is a busy city, and traffic can be heavy at peak hours.
If you have extra time, visit the Meiji Jingu Shrine or the JR Tokyo Station. If you have less time, consider skipping the Robot Restaurant and Ginza.
The airport serving Tokyo is the Tokyo-Narita Airport (NRT) located about 60 km from the city center. You can reach the city via the Narita Express train or bus services which take about 1-2 hours, depending on traffic. Another airport is the Tokyo International Airport (HND), also known as Haneda Airport, located closer to the city, about 15 km from central Tokyo. The airport is accessible via a monorail or a train to Tokyo Station, which takes about 30 minutes.