Japan Voltage and Adapter Guide

Japan’s Power System

Voltage: 100V (lower than USA’s 120V and Europe’s 220–240V)
Frequency: 50Hz (East Japan, including Tokyo) / 60Hz (West Japan, including Osaka, Kyoto)
Plug type: Type A — two flat parallel prongs (same as USA/Canada)

Do You Need an Adapter?

From USA/Canada: No adapter needed. Plug types are identical. Devices rated 100–120V work fine on Japan’s 100V.
From UK (Type G plugs): Need a Type A adapter. Most modern electronics (phones, laptops) are dual-voltage 100–240V and work without a converter.
From Europe (Type C/F plugs): Need a Type A adapter. Again, most modern electronics are dual-voltage.
From Australia (Type I): Need a Type A adapter. Check your device’s power brick for “100–240V”.

Checking Your Devices

Look on the power brick or charger for the input voltage rating. “INPUT: 100–240V, 50/60Hz” means dual-voltage — safe to use anywhere with just a plug adapter. Single-voltage European devices (220–240V only) need a voltage converter in Japan.

Where to Buy Adapters in Japan

Airport shops (Narita, Haneda, KIX), Yodobashi Camera, BIC Camera, and convenience stores. ¥300–1,500 depending on type. Widely available if you forget yours.