I didn’t pay attention to some of the itinerary changes to my flights, so I ended up with a 7 hour layover in Narita. When I called American Airlines to change it, the agent couldn’t change the flights due to capacity. She did recommend a tour of the Narita Temple to pass the time. I sent a few emails to Narita Rainbow Tours and arranged the tour. (If you have a 4-5 hour layover, you can still do the tour.)
The Narita temple is one of the most popular Buddhist temples in Japan, and many Japanese continue to visit the temple today.