Japan uses plug type A and type B, and the voltage is lower than in many countries. Most phone, laptop and camera chargers accept the Japanese voltage. You need a plug adapter, not a voltage converter. Check the label on each charger before you pack, and carry a power bank in your hand luggage.
The plug
Japanese outlets have two flat pins. Some have a third round earth pin, which is type B. An adapter for your country will usually fit.
- Buy one plain adapter that covers type A and type B.
- Choose an adapter with no built-in converter if your devices already accept Japanese voltage.
- Bring one spare adapter, because hotel rooms can have few outlets.
The voltage
Japan uses a lower voltage than many countries. Most modern chargers are rated for a wide range of voltages. The label on the charger will say the range.
- If the label says the range covers the Japanese voltage, you need only an adapter.
- If the device accepts only one voltage that is different, use a converter. Hair dryers and some older kettles are the common cases.
- Do not plug a heater or a straightener into a converter that is too small for it.
Check first: Read the input range printed on each charger. Compare it with the voltage on the official Japanese electrical guide from your airline or a trusted electrical brand. If the range is not clear, leave the device at home.
Outlets in hotels and trains
Most hotel rooms have outlets near the bed or the desk. Some older hotels have only a few. Plan to charge phones overnight.
On the Shinkansen and on many express trains, there are seat power outlets. Not every seat has one. If you need power on a long ride, pick a seat near an outlet when you reserve.
Cafes and station waiting areas often have outlets too. Ask staff before you plug in a device at a counter.
Power banks on a flight
Power banks are batteries. Airlines have strict rules about them. The rules set how big a battery can be, and most airlines do not allow power banks in the hold. Many airlines also ask you to keep them out of the overhead bin.
- Carry the power bank in your hand luggage, not in the checked bag.
- Check the capacity printed on the power bank. Your airline and the aviation authority of your country set the limits.
- Do not pack loose batteries in a bag that goes into the hold.
- Keep the power bank in a case, and keep the terminals covered.
The rules can change, and different airlines apply them in different ways. Some airlines set their own limits.
Check first: Read your airline's page on carrying power banks, and the notice on the official Japan National Tourism Organization site. Check both a few weeks before you fly, because rules change.
Pack a simple charging set
A small set works for most trips:
| Item | Why |
|---|---|
| One plug adapter for type A and type B | Fits almost every outlet |
| One power bank in hand luggage | Charges your phone on the move |
| One short cable for each phone | Avoids sharing one cable |
| A charger with a known voltage range | Safe for hotel use |
Keep the charger, the adapter and the cable in one pouch. You will find them quickly at a hotel desk.
Do not buy power at the last minute
Some airports and stations sell power banks. Prices and stock vary. A cheap power bank from an unknown seller may not meet airline rules. Buy from a known brand before you travel, and test it at home.
Phones, laptops and cameras
Most phones, tablets, laptops and cameras come with a charger that accepts a wide voltage range. These chargers need only a plug adapter. Read the label on the brick, not only the box.
Some devices are different. A hair dryer, a straightener or a kettle may accept only one voltage. Buy a cheap one in Japan if you need it, or ask your hotel if it lends one. Do not use a large converter with a heater. The heat can damage the device and the converter.
Check the cable as well. A cable with a damaged end can charge slowly or not at all. Pack a spare cable in the pouch, not in the checked bag.
What to do next
Choose the city that you visit first, then plan your charging stops around the day. The planner builds a day plan, and a city page shows the areas to see.