Public telephones accept 10 yen and 100 yen coins and/or telephone cards. A local call (within Tokyo's central 23 Wards and some other metropolitan cities) costs 10 yen per minute. If you put in two 10-yen coins and speak for less than one minute, one of the coins will be returned to you. No change is given for partial use of a 100 yen coin. Prepaid telephone cards cost 1,000 yen from vending machines, kiosks at train stations, and convenience stores. Charges for inter-city calls vary according to the distance. Domestic calls are cheaper at night and on Saturday, Sunday & national holidays.
Telephone numbers in Japan consist of an area code and a phone number (Exchange Number + Subscriber's Number). For example: (03) 1234-5678.