Japan Plugs and Voltage 2026: Will Your Devices Work and Which Adapter to Bring
- Japan uses 100V nationwide, and outlets take two flat parallel pins
- Frequency splits in two: 50Hz on the Tokyo side, 60Hz in Nagoya, Kyoto and Osaka
- A label reading 100–240V covers Japan; 50/60Hz works on both sides
- 60Hz-only devices are outside their range in Tokyo; for 110V-only devices, pack a wide-voltage model instead
If you are coming from Taiwan, home power is 110V (some outlets are 220V) at 60Hz, so a two-flat-pin plug will usually fit. What really matters is the label on your device.
The frequency boundary runs roughly along a line between the Itoigawa River in Niigata and the Fuji River in Shizuoka.
Japan voltage 100V vs Taiwan 110V: voltage, frequency and plug shape
| Item | Japan | Taiwan |
|---|---|---|
| Voltage | 100V nationwide | 110V or 220V in homes |
| Frequency | 50Hz in the east, 60Hz in the west | 60Hz |
| Plug | Two flat parallel pins (Type A) | Type A (two flat pins) and Type B (with a ground pin) |
The Taoyuan tourism site notes that many buildings in Taiwan also have 220V sockets, mainly for air conditioners. Either way, the label on the device decides.
Tokyo is 50Hz, Osaka is 60Hz
An article by the Agency for Natural Resources and Energy (part of the Ministry of Economy, Trade and Industry) refers to "eastern Japan (50Hz) and western Japan (60Hz), which use different frequencies". It also mentions a plan for an interregional link between the Tokyo and Chubu areas.
Kansai Electric Power's education page puts it plainly: west of the line between the Itoigawa River (Niigata) and the Fuji River (Shizuoka) is 60Hz, east of it is 50Hz.
The split goes back to the Meiji era, when Tokyo imported German generators (50Hz) and Osaka imported American ones (60Hz). Talks about unifying the two started around 100 years ago and never succeeded.
Which cities are on which side
- Tokyo: 50Hz. Edogawa City's guide for foreign residents states that Tokyo is "50 hertz, 100 volts".
- Nagoya, Kyoto and Osaka: 60Hz. JNTO names these three cities on the 60Hz side.
If your trip covers both Tokyo and Kansai, you will meet both frequencies.
Read your device label: 100–240V and 50/60Hz are safe
Before you pack, turn each device over and find the INPUT line or rating plate. Check two things: voltage and frequency.
| Label says | In Japan | Notes |
|---|---|---|
| A wide range such as 100–240V | 100V is inside the range | dual-voltage hair dryers, travel irons and shavers should work anywhere in Japan |
| 50/60Hz | Works in Tokyo and Osaka | items marked 50/60Hz can be used anywhere |
| 60Hz only | Only for 60Hz areas; Tokyo is 50Hz | single-frequency items only work in that frequency's area |
| 110V only | Doesn't match Japan's 100V; a wide-voltage model is the safer pick | mismatched voltage or frequency can cause breakdowns; appliances from abroad often don't match Japanese standards |
Kansai Electric warns that switching on without checking can cause a breakdown or even a fire.
Its list is for people moving within Japan: hair dryers, vacuum cleaners and fans "change in performance", microwaves, washing machines and electric clocks "can't be used as is", and TVs, computers and electric kettles "work as usual", depending on the model. The list dates from February 2016, so treat it as a reminder that frequency can affect some devices.
JNTO says that apart from dual-voltage items, a step-down transformer is needed. If a device's label doesn't include 100V and you're not sure, don't plug it in. Packing a wide-voltage model is the easiest fix.
Japan plug type: two-pin fits, three-pin needs an adapter
JNTO describes Japanese outlets as taking two flat parallel prongs, calls them Type A in its FAQ, and suggests visitors may need a plug adapter, ideally bought in advance. Laptop power bricks and some hair dryers have a third ground pin (Type B). Japanese outlets have two slots, so if your device has a three-pin plug, pack an adapter before you leave so you're not stuck at the hotel.
If you forget, JNTO says adapters and transformers are relatively easy to find in cities: in electronics districts such as Akihabara in Tokyo and Nipponbashi in Osaka, or at large chains like Yodobashi Camera and Bic Camera.
Chargers, hair dryers and power banks: what to check
| Device | Check first | Notes |
|---|---|---|
| Phone, tablet, laptop chargers | Does INPUT cover 100V and say 50/60Hz? | Three-pin plugs need an adapter |
| Hair dryer, curling iron | Is it dual-voltage? | JNTO names dual-voltage hair dryers as usable; Kansai Electric lists hair dryers as "performance changes" when frequency differs |
| Shaver, travel iron | Is it dual-voltage? | JNTO names dual-voltage models as usable |
| Power bank | Same check for its charger | Flight rules: see Japan Power Bank Rules 2026 |
Getting around: outlets at shinkansen window seats
JNTO notes that newer shinkansen models have outlets next to the window seats, and you can ask staff for one when you buy your ticket. Some hamburger chains and family restaurants also have outlets. A shinkansen ride from Tokyo to Kyoto or Osaka crosses the 50Hz/60Hz boundary.
Airport transfer options are covered in Narita Airport to Tokyo 2026, Haneda Airport to Tokyo 2026 and Kansai Airport to Osaka 2026.
Plug adapters and transformers: where to buy in Japan
- Plug adapter: needed when your plug isn't two flat parallel pins. Sold in Akihabara, Nipponbashi and large electronics chains.
- Transformer: needed when your device's voltage doesn't cover 100V. Sold in the same places.
- Wide-voltage device: worth considering when your device is 110V only. Buy it before you leave home and you won't need a transformer in Japan.
Where to stay: only the frequency changes
Whether you stay in Shinjuku, Ueno, Umeda or Namba, the voltage is 100V and the outlets look the same. The only difference is 50Hz on the Tokyo side and 60Hz in Kyoto and Osaka, so pick your area by transport and itinerary. The one thing to watch is a device marked 60Hz only, which is outside its rated range in Tokyo.
Japan plugs and voltage FAQ
Will my phone charger work in Japan?＋
If the plug has two flat pins, it fits. If the INPUT reads 100–240V and 50/60Hz, both voltage and frequency are covered.
Is Japan 100V or 110V?＋
100V. JNTO says the voltage is uniformly 100V throughout Japan. 110V is the usual household voltage in Taiwan.
Can I use a 110V-only hair dryer?＋
JNTO names dual-voltage hair dryers as usable, and Edogawa City warns that mismatched voltage or frequency can cause breakdowns. A dual-voltage model is the simpler choice.
Do Japanese outlets have a ground hole?＋
Japanese outlets take two flat parallel prongs, so a three-pin plug won't fit. Bring an adapter.
Is the power the same in Tokyo and Osaka?＋
Same 100V, different frequency: 50Hz in Tokyo, 60Hz in Osaka. Devices marked 50/60Hz work in both.
I forgot my adapter. Now what?＋
JNTO says they're easy to find in cities, for example in Akihabara, Nipponbashi, Yodobashi Camera or Bic Camera.
