Electrical Standards in Japan
The voltage in Japan is 100 Volt, which is different from North America (120V), Central Europe (230V) and most other regions of the world. Japanese electrical plugs and outlets resemble North American ones. Japanese power outlets come in two varieties – type A and B.
In the United States, power outlets are type B (see image). If you’re coming from the US, you will be able to fit your plugs anywhere there is a type B outlet as it is the same size and shape.
In Japan, you will also find type A power sockets (see image). These have space for just two prongs and therefore you will not be able to insert your three-pronged plug into it. In these cases, you will need an adapter – a 3-2 prong adapter to be more precise.
There are also matters of electrical voltage and frequency to consider. The standard voltage in Japan is 100V at 50/60 Hz (depending on location), while that in the United States is 120V at 60 Hz. These differences can sometimes cause damage to the device or result in a lower functioning performance. For this reason, purchasing a voltage & frequency converter would prevent issues. Considering you will likely need 3-2 prong adapter when using type B sockets, consider purchasing one travel adapter that does it all. Here’s one that is recommended. Remember, too, that these kinds of adapters provide a good number of USB outlets, too. Most of us have lots of devices that need recharging by this means.
Hairdryers, curling irons, straightening irons, and other heated devices tend to overheat or not work properly unless used in conjunction with a voltage adapter in the electrical outlets in Japan. Voltage adapters are typically big, heavy, and not very convenient. It’s worth noting that many hotels offer special equipment such as blow-dryers to their guests. Also, rather than bring your own blow-dryer/curling iron/straightening iron, consider buying one in Japan just for your use while there.
Here are some examples of Japanese plugs and sockets.
