Subways not running between 1am and 5am seems like a good thing to me if it means they can use that time to maintain the tracks and stations.
The trains and subways in Tokyo are amazing, clean, on time but they stop at 1am and start up around 5am. That sucks for you if you don't want to cab it home after around 12am. As a night owl I love it though as it means there are tons of night venues that are open until at least 5am and I just add the cab fare into my "entertainment budget" if I don't intend to stay out all night.
The trains and subways in Tokyo are amazing, clean, on time but they stop at 1am and start up around 5am. That sucks for you if you don't want to cab it home after around 12am. As a night owl I love it though as it means there are tons of night venues that are open until at least 5am and I just add the cab fare into my "entertainment budget" if I don't intend to stay out all night.