"The Tokyo Metropolitan Government said Thursday it will start a 24-hour bus service in December.Bus services will be offered once an hour between the Shibuya and Roppongi districts between 1 and 5 a.m. every Saturday on a trial basis.The bus fare will be ¥400, equal to fares on current late-night Tokyo buses."
Source: Tokyo to start 24-hour bus service in December
JIJI
JUN 14, 2013
Japan Times