Does Japan need an adapter?

is needed. The voltage used in Japan is also very different from that in China. They use 1v, while ours is 25v V. Therefore, it is necessary to prepare a transformer for high-power electrical appliances, such as hair dryers and electric irons, which are brought in the past in China.

the socket panel in Japan has six holes 15A, three holes in the top and three holes in the bottom. Two three-pin plugs can be inserted at the same time. Two pins without grounding can also be inserted at the same time. Both two-pin and three-pin plugs are "flat and vertical" and can be used universally. The domestic two-pin plug is "vertical", while the two metal pieces outside the ground wire of the three-pin plug are "inclined". Therefore, the domestic two-pin plug cannot be inserted into the three-hole socket panel.

The two-hole plug and the three-hole plug in Japan are the same in shape and size and can be used universally. Including the socket for air conditioning, you can also use ordinary plugs, which has good compatibility. At present, there are five-hole 1A sockets in China, and two plugs can be plugged in at the same time. Can this explain that the ordinary standard five-hole socket is a design failure?

Well, I know the difference between the sockets in China and Japan. When traveling to Japan, if it is a plug with three holes, remember to bring a Wanpu GSM travel adapter.