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Japan Plugs and Voltage: 100V, Type A Outlets, 50Hz East and 60Hz West, and Who Needs an Adapter

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Japan runs on 100V with two flat-pin Type A outlets. Whether plugs and voltage match for Korea, Taiwan, Hong Kong, the US and others, and the east-west frequency split.

A utility pole with tangled wires in a Japanese street

Outlets in Japanese homes and hotels supply 100V through Type A sockets with two flat pins. The frequency is 50Hz in the east of the country and 60Hz in the west.

Electrical equipment on an outside wall
Japan's mains supply is 100V

The basics

Japan uses 100V and two-flat-pin Type A plugs
  1. 100V Voltage homes and hotels
  2. Type A Plug two flat pins
  3. 50/60Hz Frequency 50 east, 60 west

IEC World Plugs and Japan's Ministry of Economy, Trade and Industry energy education material.

Will your plug and devices work?

Taiwan and US plugs fit as they are; Korea and Hong Kong need an adapter

Same Different

Same plugSimilar voltage
Korea (220V, C/F)
Taiwan (110V, A/B)
Hong Kong (220V, G)
United States (120V, A/B)
United Kingdom (230V, G)
Singapore (230V, G)
Australia (230V, I)

IEC World Plugs. Similar voltage means the 100-127V range, like Japan.

Most phone, laptop and camera chargers accept 100-240V, so they work in Japan once the plug shape fits. The input rating on the charger or device shows whether 100V is included.

Devices made only for 220V do not run properly on Japan’s 100V and need a transformer.

50Hz east, 60Hz west

The frequency changes at the Fuji River in Shizuoka and Itoigawa in Niigata
  1. 50Hz East Hokkaido, Tohoku, Kanto
  2. 60Hz West Kansai, Kyushu, Okinawa

Japan's Ministry of Economy, Trade and Industry energy education material. Areas near the line in Shizuoka, Nagano and Niigata are mixed.

Tokyo is on 50Hz; Osaka, Kyoto, Fukuoka and Okinawa are on 60Hz. Chargers and most electronics work on both, and only appliances marked for 50Hz or 60Hz alone depend on the region.

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