Japan Travel Adapter: Type A Plugs, 100V and USB-C Charging

Choose the right plug adapter or charger for Japan without confusing plug shape with voltage conversion.

Reviewed August 6, 2026Published by PROPS LLC

The short answer

Japan uses Type A plugs and 100V electricity. Check the input label on every charger first: a plug adapter changes the shape, while only a compatible charger or transformer handles voltage.

Before you buy

Use this four-point check.

  1. 01

    Read the INPUT line on every charger or appliance.

  2. 02

    Confirm that the device accepts 100V and the local 50/60Hz frequency.

  3. 03

    Choose Type A pins; grounded Type B outlets are not available everywhere.

  4. 04

    Avoid using high-heat appliances unless the manufacturer explicitly supports Japan.

What to know

Plug shape and voltage are separate decisions

Japan’s common outlet accepts two flat parallel pins. Travelers from the United States and Canada may already have the right plug shape, but they still need to confirm voltage compatibility. Travelers from the United Kingdom, Europe and Australia normally need a physical adapter.

The safest signal is the manufacturer’s input label. A range that includes 100V and both 50/60Hz is generally designed for Japan’s supply; a single-voltage appliance needs manufacturer guidance or a correctly rated transformer.

What to know

Hair tools are the common failure point

Hair dryers, straighteners, kettles and travel irons draw far more power than phone chargers. Do not assume a small universal adapter can safely run them. Use a clearly dual-voltage model or the appliance provided by the accommodation.

  • Do not force a grounded plug into an ungrounded adapter.
  • Do not daisy-chain power strips or adapters.
  • Stop using any device that smells hot, sparks or fits loosely.

Frequently asked questions

Power adapter FAQ

Do US travelers need a plug adapter for Japan?

Many US two-pin plugs fit Japan’s Type A outlets, but three-pin plugs need a suitable adapter and every device still needs a voltage check.

Will a plug adapter convert 230V to 100V?

No. A basic plug adapter changes only the pin shape. Voltage conversion requires a correctly rated transformer or an appliance designed for 100–240V input.

Primary evidence

Official sources used

Reopen these pages before travel. Rules and safety guidance can change after this article’s review date.