You Do Need power plug adapter while traveling from Macau to Japan.

Here is Why You Need An Adapter

The outlet and plug type used in Japan are A and B and in Macau is G. This is how they look like.


Macau

In Macau, outlets of type G are in use.

Type G

Japan

In Japan, outlets of type A and B are in use.

Type A
Type B

Plug and Socket Compatibility Checker

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