I had an eight-hour layover in Tokyo (Narita). After doing a lot of research, I realized that I wouldn't have enough time to go into Tokyo without feeling incredibly rushed to get back to the airport to catch my connection home. Instead, I decided to visit the little town of Narita, about a 20-minute subway ride from the airport (under 200 yen). The main attraction is the Shinso-ji Temple (very walkable from the subway station). Take some time and stroll around the temple grounds, pop into some of the shops in the area, and then grab a delicious lunch before heading back to the airport.