Power plugs and voltage in Japan: what to bring
Japan uses 100 volts everywhere. Most phone and laptop chargers (100-240V) work fine, but single-voltage devices from 220-240V countries need a transformer.
Voltage and frequency
Japan uses 100 volts AC across the whole country. This is lower than in many other countries.
- Eastern Japan (including Tokyo) uses 50 Hz.
- Western Japan (including Nagoya, Kyoto and Osaka) uses 60 Hz.
Check your device label
Look at the small print on your charger or device. If it says something like "INPUT: 100-240V", the device is dual-voltage and should work in Japan.
- Dual-voltage hair dryers, travel irons and shavers should work anywhere in Japan.
- Other appliances that are made for one higher voltage may need a step-down transformer.
The official page does not describe plug shapes, so also check that your plug physically fits the outlet. If it does not, buy a plug adapter. An adapter changes only the shape, not the voltage.
Where to buy adapters
Adapters and transformers are easy to find in big cities.
- Electronics districts such as Akihabara in Tokyo and Nipponbashi in Osaka.
- Large electronics stores such as Yodobashi Camera and Bic Camera.
Charging while you travel
- Newer Shinkansen (bullet train) models have outlets at window seats. Ask the staff for one when you buy your ticket.
- Some hamburger chains and family restaurants have outlets. Not all of them do, so ask first.
FAQ
Do I need a voltage converter for my phone?
Usually not. Most phone and laptop chargers say 100-240V on the label. Check the label to be sure.
Can I use my 230V hair dryer in Japan?
Only if it is dual-voltage. A single-voltage 230V dryer needs a transformer, and high-power devices may not work well. A hotel dryer is often easier.
Does the 50/60 Hz difference matter?
For chargers and most travel electronics it usually does not. Check the label if you carry unusual equipment.
Sources
Related tips
- Free Wi-Fi in Japan: how to find it and connectLook for the "Japan.Free Wi-Fi" symbol. Free Wi-Fi in Japan comes from several providers, and each one has its own way to connect, so set things up before you need them.
- Shinkansen reserved vs non-reserved seats: which to chooseA reserved seat guarantees you a place on a set train. A non-reserved seat is first come, first served on any train that day. On the Tokaido and Sanyo lines, all Nozomi seats are reserved in major peak periods.
- Why Japanese hotels ask to see and copy your passportHotels in Japan must record the nationality and passport number of guests who do not live in Japan, and the Ministry of Health, Labour and Welfare tells them to keep a copy.
- Convenience stores in Japan: ATMs, payments and moreJapanese convenience stores (konbini) are open for long hours and can do more than sell snacks: cash withdrawals with a foreign card, many payment methods and tax-free shopping at some stores.
- SIM cards and pocket Wi-Fi in Japan: how to stay onlineFree Wi-Fi is not everywhere. JNTO lists two main ways to get data: a prepaid SIM card for an unlocked phone, or a rental pocket Wi-Fi router. Reserve a router before you go.
Last checked: 2026-11-02. Rules and prices can change, so please confirm with the official sources above.