What is the airport code for the capital of Japan, Tokyo?

The airport code for the capital of Japan, Tokyo, is indeed NRT, which stands for Narita International Airport. Narita serves as one of the primary international gateways to Tokyo. It is located approximately 60 kilometers east of central Tokyo and handles a significant volume of international flights.

The other options represent codes for various airports in other locations: TPA refers to Tampa International Airport in Florida, SYR is Syracuse Hancock International Airport in New York, and SXM stands for Princess Juliana International Airport on the island of Sint Maarten. These codes are unrelated to Tokyo, making NRT the correct identification for the airport serving Japan's capital.