date_default_timezone_set() in php for japan code example
Example: date_default_timezone_set for india in php
<?php
date_default_timezone_set("Asia/Kolkata"); //India time (GMT+5:30)
echo date('d-m-Y H:i:s');
?>
<?php
date_default_timezone_set("Asia/Kolkata"); //India time (GMT+5:30)
echo date('d-m-Y H:i:s');
?>