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Countries7 min read

Travel adapters for Japan: Type A/B, 100 V and 50/60 Hz

Japan normally uses a 100 V supply, well below the European level. Type A and some Type B sockets are common, and the mains frequency differs between eastern and western regions.

In brief

  • ✓Type A is common and unearthed.
  • ✓Japan's nominal voltage is 100 V.
  • ✓Frequency is 50 Hz in some regions and 60 Hz in others.

Type A and Type B

Many outlets accept two-pin Type A plugs. Earthed Type B outlets are also used, but availability can vary. An earthed appliance needs the correct connection and a suitable outlet.

The 100 V supply

Wide-range chargers marked 100–240 V normally cover 100 V. A device marked only 220–240 V is not confirmed for direct use and may not work correctly.

Regional 50 Hz and 60 Hz

Eastern Japan commonly uses 50 Hz and western Japan 60 Hz. Modern electronic chargers often support both, while motors, clocks and specialised equipment may be frequency-sensitive.

Common questions

FAQ

Do European travellers need an adapter in Japan?+

Usually yes for Type C, E or F plugs.

Will a 100–240 V charger work at 100 V?+

Normally yes if it also supports the local frequency.

Why does Japan use two frequencies?+

The electricity systems developed with different imported generation equipment; travellers mainly need to check frequency-sensitive devices.

Sources

Sources used

Reviewed: 2 August 2026

World Plugs

International Electrotechnical Commission (IEC) · Primary source

IEC country overview of commonly used plug types, nominal voltages and frequencies.

IEC 60884-2-5

International Electrotechnical Commission (IEC) · Primary source

IEC safety requirements for household adapters with or without protective earth.

IEC 60884-1:2022

International Electrotechnical Commission (IEC) · Primary source

Core standard for household plugs and socket-outlets with or without protective earth.

Plugs and sockets

World Standards · Supplementary source

Supplementary country and territory overview of plug types, voltage and frequency.

The sources support the technical statements in this guide. For a particular device, its label, manual and manufacturer approval remain decisive.

All sources and methodology →

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