Local Conventions For Writing Telephone Numbers - Asia - Japan

Japan

The traditional convention for phone numbers is (0AA) BBB-BBBB, where 0AA is the area code and BBB-BBBB is the subscriber number. This number format is very similar to the North American numbering plan, however, the country has a trunk code of 0 instead of 1, so international callers (using +81) do not have to dial the trunk code when calling to Japan. Telephone numbers were nine digits long in Tokyo and Osaka until the late 1990s, when a seventh digit was added to the subscriber number. Densely populated areas have shorter area codes, while rural areas have longer area codes, however, the last two digits of a five digit long area code (including the first zero) may also be the first two digits of the subscriber number. Area codes increase from north to south, except in areas such as the western Hokuriku region and the prefecture of Okinawa, where area codes increase from west to east or south to north.

Some telephone numbers deviate from this rule:

  • Toll-free dialing and Navi Dial operations (0120-XX-XXXX, 0570-XX-XXXX, or 0800-XX-XXXX), where XX-XXXX is the subscriber number
  • 110 and 119' are examples of three digit emergency numbers

Read more about this topic:  Local Conventions For Writing Telephone Numbers, Asia

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