Can I Use My CPAP Machine in Japan?

Q: What plug type does Japan use?

Japan uses Type A/B sockets at 100V / 50/60Hz.

Yes — your CPAP machine works in Japan as-is.

Good to go

Your device's voltage range matches this country, and the plug fits. You can use it directly — no adapter or converter needed. As a final check, confirm the voltage range printed on the device label.

Device label dual
Destination grid 100⁠V / 50/60⁠Hz
Plug fit Type A/B fits
Verdict Good to go

Device voltage: dual
Destination grid: 100⁠V / 50/60⁠Hz
Plug type: Type A/B fits
Typical wattage: 30–90⁠W
Verdict: Good to go
Reviewed: 2026-07-16

Based on what's typical for this device — confirm on the label to be sure.

Destination grid frequency varies by region (e.g. Japan: 50Hz east / 60Hz west).

Next step

What to do next

Add it to a trip checklistKeep CPAP Machine in a saved packing verdict for Japan.Check another deviceUse the same destination with a different charger or appliance.Read label examplesConfirm what 100-240V, 120V, and 230V labels mean.

Why

Your CPAP machine's voltage range matches Japan's 100V and the plug fits, so you can use it directly — no adapter or converter needed. As a final check, confirm the voltage range printed on the device label.

Japan runs 100⁠V / 50/60⁠Hz. 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.

CPAP Machine in Japan at a glance

Your CPAP machine vs Japan's grid
Device voltage profile	dual
Typical wattage	30–90⁠W
Destination voltage	100⁠V
Destination frequency	50/60⁠Hz
Destination plug types	Type A/B
Voltage mismatch	120⁠V → 100⁠V = -20⁠V
Verdict	Good to go

Plug types in Japan: Type A, Type B

Final check: look for "INPUT 100-240V" or a matching local voltage on the label before you plug in.

For medical devices, always confirm voltage on the label and check with the manufacturer when in doubt.

Other devices & destinations

Power outlets in Japan Using a CPAP machine abroad CPAP Machine in South Korea CPAP Machine in China

FAQ

Can I use my CPAP machine in Japan?

Yes — your CPAP machine works in Japan as-is. Japan runs 100⁠V / 50/60⁠Hz on Type A/B sockets.

Will a travel adapter let me use my CPAP machine in Japan?

Japan sockets use Type A/B. Your plug already fits, so no adapter is needed.

Do I need a voltage converter for a CPAP machine in Japan?

No. If your CPAP machine is dual-voltage (100–240V), you don't need a converter in Japan.

What plug type does Japan use?

Japan uses Type A/B sockets at 100⁠V / 50/60⁠Hz.

Adapter vs converter explained

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.