Power Outlets & Plugs in Japan
Japan at a glance
| Voltage | 100V |
|---|---|
| Frequency | 50Hz / 60Hz |
| Plug types | Type A, B |
| Voltage zone | LOW |
| US plug fits? | Often yes |
Plug types used in Japan
Type A Type B · grounded
Japan uses 100V — the lowest standard mains voltage of any developed country. Plugs look identical to US Type A/B, but the lower voltage means even a US 120V device runs slightly weaker. The frequency is split: 50Hz in the east (Tokyo), 60Hz in the west (Osaka). This matters only for motor- and clock-based devices, not for 50/60Hz-labeled chargers.
Your devices in Japan
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Japan outlet FAQ
Can I charge my phone in Japan without a converter?
Yes. Phone and laptop chargers are dual-voltage (100–240V) — you only need a plug adapter.
Is 100V dangerous for US devices?
Japan runs 100V, close to the US 120V, so US devices are generally safe.
What plug type does Japan use?
Japan uses Type A, B sockets at 100V / 50Hz.
Related
Adapter vs converter ·
What "100–240V" means
Nearby: South Korea
Guidance only — not professional electrical advice. Always confirm against your device's label before plugging in. Local wiring (especially in hotels and older buildings) can vary.