Why are there no trains or bus services from Narita Airport after 11 pm?

Ref. While Narita isn't the best airport to arrive in Tokyo (it's way too far from city center; look at the Alice in Wonderland: TYO section of Airport Tips) it is still Tokyo's main airport -- and flying to Haneda is sometimes impossible, or more expensive. There have been some Area 51-grade conspiracy theories about … Continue reading Why are there no trains or bus services from Narita Airport after 11 pm?