You're going to travel to Japan and you don't know if your electric devices (your computer, mobile phone, battery charger...) will be able to work there?
To know if you need a travel plug adapter to go to Japan, you have to consider 3 things : the shape of the plugs, the voltage and the frequency of the current delivered by electrical outlets in Japan.
Here are the shape of the sockets in Japan, and the the types of plugs used in Japan :
If none of your usual plug is compatible, you should buy a universal travel adapter to be able to plug your electric devices (please visit our selection on Amazon for details).
Voltage : 100 V
Frequency : 50/60 Hz