Japanese aviation authorities on Friday followed their US counterparts by urging passengers not to turn on or charge Samsung Galaxy Note 7 smartphones on aircraft following reports of explosions from faulty batteries.
The South Korean smartphone maker last week suspended sales of the "phablet" and recalled 2.5 million units following the reports.
After the US, Japan's transport ministry followed suit on Friday.
The phone is not yet on sale in Japan, but the ministry cited accidents overseas for its warning, which also cautioned against using or charging them onboard, or stowing them in checked bags.
"Until such time that safety measures are taken by Samsung, the ministry has requested that Japanese airlines strongly communicate instructions to passengers regarding bringing Galaxy Note 7 on board planes," the ministry said in a statement.
"In light of recent incidents and concerns raised by Samsung about its Galaxy Note 7 devices, the Federal Aviation Administration strongly advises passengers not to turn on or charge these devices on board aircraft and not to stow them in any checked baggage," the US FAA said in a statement Thursday.
Qantas and Virgin Australia also told customers Thursday not to use or charge the devices on their planes.
Samsung is the world's top smartphone maker, outpacing its American rival Apple.