JAPAN NOW · FLIGHT SAFETY
Stated effective date April 24, 2026; final source check August 15
The original stated that Japanese domestic flights limited power banks to two per passenger, each no more than 160 Wh, and prohibited charging the bank or using it to charge another device on board from April 24, 2026. This preserves the dated source summary, not independently verified current aviation guidance.
Rules listed in the original
- Power banks belong in cabin baggage, not checked bags.
- The stated limit was up to two, each no more than 160 Wh.
- Do not charge the power bank or a phone from it during flight under the described rule.
- Keep it where abnormal heating can be noticed promptly.
What if only mAh is shown?
The source said most units also show Wh. Without that marking, voltage and capacity would be needed to calculate it, potentially difficult at the airport; use an undamaged label and examine the actual unit, especially larger-capacity products. No numerical conversion is invented here.
Journeys needing particular checking
For a Japan domestic connection from Fukuoka to Okinawa, Tokyo, or Sapporo, rules checked for an international departure alone may be insufficient. The original used a South Korea departure as its audience example; Western arrivals should likewise check the actual domestic operator, whose conditions may be stricter.
EDITOR'S NOTE
EVERYDAY TRIP Editorial Team’s analysis and advice
The original advised photographing the unit’s Wh label before travel, keeping it observable rather than deep in a bag or overhead, and completing charging before a domestic connection. These are the original’s safety-planning suggestions; use the actual airline’s current requirements for a flight.
Official sources
Japan National Tourism Organization Safe Travel Information →
Airlines could differ in detailed conditions; check the actual operator’s latest baggage rules.