Tokyo is 1 hour ahead of Dongguan.
Time difference
Dongguan is 1 hour behind Tokyo, all year.
Working hours
A standard 9-to-6 workday in Tokyo overlaps with Dongguan from 10:00 to 18:00 (09:00 to 17:00 in Dongguan). The easiest time to meet is around 14:00 in Tokyo, which is 13:00 in Dongguan.
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