Voltage / Electric Plug Type / Measurement Conversion Table / Water

Electricity and Voltage

In Japan, the voltage supply is uniformly 100 volts throughout the country, but two frequencies are used. In the eastern half of Japan (Sapporo, Sendai, Tokyo, Yokohama, etc.), the frequency is 50 hertz, and in the western half (Nagoya, Kyoto, Osaka, Hiroshima, Fukuoka, etc.) it is 60 hertz.
Foreign electrical appliances such as hair dryers, travel irons, and electric shavers that can change voltages are convenient. For those that cannot, a step-down voltage converter is recommended.

Electrical Plugs

Cylindrical plugs or 3-pin plugs are not in use in Japan; instead plugs with two flat pins are used. It is advisable to purchase a plug adapter beforehand if needed.

Measurement Conversion Table

See the Measurement Conversion Tablefor more information.



Japan’s tap water undergoes very strict testing by waterworks authorities, and tap water from anywhere in Japan can be drunk safely. In some areas of the largest cities of Tokyo, Yokohama, and Osaka, however, some residents question the taste of the tap water, and more and more people are drinking commercially-sold mineral water on a regular basis. Mineral water, both domestic brands and major imported brands, can be easily obtained at supermarkets, convenience stores, or other similar stores.


Supermarkets| Convenience stores