In Japan there are different standards for the generation and transmission of electricity, which is why it is recommended to check the electrical specification of the country of the rising sun before making a first trip.
Some of the terms expressed below could make the subject easier to understand:
Voltage: or also called voltage, defined, basically, as the volts that act in an electrical device or system.
Plug or socket: A plug or plug is a piece of insulating material from which metal rods protrude and are inserted into the socket to establish the electrical connection.
Electrical frequency: it is a variable that corresponds to the wave formed by the alternating current. In Japan the common voltage is 100 Volts. The frequency is 50/60 Hertz.
The plugs and sockets are of type A / B.
Japan is connected to a current of 100 volts and uses two frequencies: 50 Hz in Kansai and in the east of the country, 60 Hz in Kanto and in the north.
Electrical appliances can be used as long as the voltage in your country of origin is between 110V and 127V (as well as in the USA, Canada and most countries in South America).
If the voltage in the country of origin is between 220V – 240V (Spain, UK, Australia and most countries in Asia and Africa), then a voltage converter or transformer will be needed in Japan.
To be sure, it is recommended to check the label on the electrical appliance. If ‘INPUT’ specifies: 100-240V, 50/60 Hz ‘, it means that it can be used in all countries of the world for both chargers for tablets, laptops, cameras, cell phones or toothbrushes.
If the frequency of alternating current in Japan (50/60 Hz) differs from your country of origin, it is not recommended to use electrical appliances.
The plugs in Japan are type A, with two flat pins, which means that depending on your country of origin, an adapter may be required. These are easily available at international airports like Narita, the Bic Camera or Yamada Denki stores, at the Akihabara stalls, or at the 100 yen stores, at an affordable price (300-500 yen).
They can also be requested at the hotel reception, as many have them available.