Plugs & voltage in Japan
Types A and B · 100 V · 50 Hz / 60 Hz
Japan is the only country in our data that runs at both 50 Hz and 60 Hz, split by area. In Asia it is one of just two countries on 100–127 V, with Taiwan. Japan is the only country in our data that lists 100 V.
Do I need an adapter for Japan?
Where are you travelling from?
Plug straight in.
100 V here, 120 V at home: the same range.
Adapter, and mind the voltage.
100 V here, 230 V at home.
Adapter, and mind the voltage.
100 V here, 230 V at home.
Adapter, and mind the voltage.
100 V here, 230 V at home.
Adapter, and mind the voltage.
Type A plugs fit; Type I plugs need an adapter to Types A or B.
100 V here, 220 V at home.
Adapter, and mind the voltage.
100 V here, 230 V at home.
Plug straight in.
The power supply
Also in the data
Its nominal 100 V is unique in Eastern Asia, where most others list 220 V.
By population it ranks 3rd among the countries that use exactly Types A and B, after the United States and Mexico.
In Eastern Asia, only Taiwan uses the same Types A and B; the other 5 do not.
Same plugs as Japan
20 other countries use exactly A/B: 19 in the Americas and 1 in Asia.
The plug types used here
Guides: 230 V vs 120 V countries · The 15 plug types explained
Source: Wikidata Q17; regions: UN M49 (Eastern Asia). Sources & method