 How to call:
00 - Exit code when making an international call from Vietnam
81 - Japanese country code for inbound calls
73 - Wakayama city code
00 + 81 + 73 + Local Number - International dialing code format
 World Times:
The time in Vietnam is now 03:34:03 AM (03:34:03 AM)
The time in Wakayama Japan is now 05:34:03 AM (05:34:03 AM)
 Mobile codes:
To call a mobile phone in Japan from Vietnam use the following dialing code format: 00 + 81 + Mobile Code* + The Number
*Japan has multiple mobile carriers: 70, 80, 90
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