Electrical Voltage and Outlets / Plugs / Sockets
Electrical voltage and outlet/plug/socket types vary from country to country.
Japan:
Voltage: 100V
Plug Type: Type A

You can check the voltage and plug type used in your country at the link below:
worldstandards
Using electrical appliances with an incompatible voltage can be dangerous and may damage the appliance. However, some devices, such as computers and audio-visual equipment, support a wide range of voltages, so they may not require a voltage converter.

Example : This appliance supports 100V–240V and can be used in countries with voltage within this range.
DVD, Blu-ray & Video Formats
When purchasing DVDs, Blu-rays, or video tapes from Japan, please make sure that the format and region code are compatible with those used in your country. Otherwise, you may not be able to play them.
Japan:
Video Format: NTSC
DVD Region Code: Region 2
Blu-ray Region Code: Region A
You can check the video format and region codes used in your country at the links below:
Video Format Standards by Country
DVD Region Codes by Country
Blu-ray Region Codes by Country

The symbols on DVD packages indicate the video format and region code.
