What kind of adapters and transformers do you need to travel to Japan?

The voltage in Japan is AC100V-110V, and Japan is an American standard two-level plug. Same as Taiwan Province Province.

For apple 6, ipadmini, MacBook air and some mobile power supplies or chargers, it is generally marked as 100-240VAC. It is a double flat plug and can be used directly.

If you have changed the mobile power supply yourself, the domestic power supply is 220VAC, and it is not dangerous to plug in the Japanese power supply, but it cannot be used normally. The China plug is a triangular flat plug, which cannot be plugged into a Japanese socket.