Important news for travelers who enjoy visiting Japan! Starting in April 2026, the Japanese government will officially ban the use of power banks inside aircraft. This policy was announced by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) as part of increasingly strict aviation safety measures related to the dangers of lithium-ion batteries.
What Exactly Is Banned by Japan?
Many people misunderstand this policy. It is important to understand: Japan does NOT prohibit passengers from bringing power banks into the aircraft cabin. What is prohibited is their use during the flight.
This regulation applies to all flights from, to, and within Japan, including transit passengers passing through airports in Japan. For those planning to fly to Japan or use Japanese airlines, it is important to understand the latest rules regarding power banks on aircraft before departure.
This ban covers two main things:
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Using a power bank to charge other devices (phones, tablets, earphones, etc.) during the flight.
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Charging the power bank itself using power outlets available on the aircraft.
Important Note: Passengers are still allowed to charge their phones or other devices using USB ports or power outlets provided directly by the airline at passenger seats. The ban only applies to the use of power banks.
Why Does Japan Ban the Use of Power Banks on Airplanes?
The decision was not made without strong reasons. Lithium-ion batteries used in power banks are known to be vulnerable to overheating, especially if the device is damaged or experiencing internal degradation. In the enclosed and high-pressure environment of an aircraft cabin, a battery fire incident could become extremely dangerous.
Concerning Incident Data
Data from the National Institute of Technology recorded 123 portable battery incidents in 2024, a sharp increase of about 160% compared to 47 cases in 2020. This surge forced aviation authorities to take stricter measures.
Air Busan Incident Becomes a Trigger
One of the most shocking incidents occurred in January 2025, when the South Korean airline Air Busan experienced a major fire on the runway that destroyed one of its aircraft. The incident strengthened global awareness of the dangers of lithium-ion batteries in aviation and pushed many countries, including Japan, to tighten regulations.
Aligned with International Standards (ICAO)
Japan’s policy is also in line with recommendations from the International Civil Aviation Organization (ICAO), which has prohibited charging portable batteries in aircraft cabins and is considering broader global guidelines.
Complete Power Bank Rules on Japanese Flights
Here is a complete summary of the power bank regulations that will apply starting April 2026:
| Regulation | Details |
|---|---|
| Use during flight | PROHIBITED (starting April 2026) |
| Carrying in cabin (carry-on) | ALLOWED (with capacity limits) |
| Placing in checked baggage | STRICTLY PROHIBITED (already applied previously) |
| Maximum capacity | Maximum 160 Wh per unit. Above 160 Wh: TOTALLY PROHIBITED |
| Maximum number per passenger | Maximum 2 units (100–160 Wh). Below 100 Wh: no quantity limit |
| Storage during flight | Must be kept in hand luggage (cabin bag), not allowed in the overhead bin |
How to Check Your Power Bank Capacity (mAh to Wh)
Most power banks list their capacity in mAh (milliampere-hours), not Wh (watt-hours). To convert it, use the following formula:
Wh = (mAh × Voltage) ÷ 1000
Example: 20,000 mAh × 3.7 V ÷ 1000 = 74 Wh (Safe to bring!)
Example: 50,000 mAh × 3.7 V ÷ 1000 = 185 Wh (PROHIBITED!)
The standard voltage for lithium-ion batteries is 3.6 V or 3.7 V. This information is usually printed on the label on your power bank.
Tips for Preparing Before Flying to Japan
To ensure your trip to Japan goes smoothly after this policy takes effect, follow these tips:
Charge all your devices before boarding
Make sure your phone, tablet, wireless earphones, camera, and laptop are fully charged before boarding the plane. This is the most important step because you will no longer be able to rely on a power bank during the flight.
Check your power bank capacity
Look at the label on your power bank. If its capacity exceeds 160 Wh, it cannot be brought into the cabin at all. Leave it at home before your trip.
Limit the number of power banks
Bring a maximum of 2 power banks with capacities between 100–160 Wh. For power banks below 100 Wh, there is no limit on the number, but it is still wise to pack responsibly.
Store it in hand luggage, not the overhead bin
Since July 2025, authorities in Japan have instructed passengers not to store power banks in the aircraft’s overhead compartment. Always keep them in a hand bag that you can easily access.
Check your airline’s policy
Each airline may have additional rules. Visit the airline’s official website or contact their customer service to ensure you comply with all requirements.
Use the aircraft’s USB ports
If your seat is equipped with a USB port or power outlet, you can use it to charge your devices directly. This is still allowed.
The ban on using power banks during flights starting in April 2026 reflects Japan’s concrete step to improve aviation safety standards, responding to the concerning rise in lithium-ion battery incidents. This policy does not stand alone—it is part of a broader global trend toward stricter aviation safety regulations.
