United Kingdom to Japan Plug Adapter
Adapter needed
Yes. Japan uses Type A and Type B sockets, and none of the plugs from the United Kingdom (Type G) fit, so you need a travel adapter.
Your plugs · United Kingdom
Voltage: 230 V
Sockets at destination · Japan
Voltage: 100 V
Voltage converter
Japan uses 100 V and the United Kingdom uses 230 V. Check the label on each device: if it says 100–240V it works anywhere; otherwise you need a voltage converter.
Frequently asked questions
Do I need a plug adapter for Japan from the United Kingdom?
Yes. Japan uses Type A and Type B sockets, and none of the plugs from the United Kingdom (Type G) fit, so you need a travel adapter.
Do I need a voltage converter for Japan?
Japan uses 100 V and the United Kingdom uses 230 V. Check the label on each device: if it says 100–240V it works anywhere; otherwise you need a voltage converter.
Source: Wikidata (CC0), retrieved 2026-10-22. Plug descriptions and compatibility are our own summary of the IEC plug types. Hotels and new buildings may have other sockets — carry a universal adapter if unsure.