The British government is organising flights from Japan and Bahrain for people unable to secure a ticket with commercial airlines.
The move follows increasing violence in Bahrain amid political protests, while in Japan fears centre around a lack of supplies and an unstable nuclear power plant.
It has not yet been confirmed when the flights will leave, but the Foreign and Commonwealth Office (FCO) is today asking people to register their interest.
The FCO is advising against all travel to Bahrain, and to north eastern Japan and Tokyo.
European airlines are continuing to fly to Japan, however a number of them are operating via other Asian airports.
British Airways is flying to Tokyo via Hong Kong and Lufthansa is flying via Seoul.
To Bahrain, flag carrier Gulf Air is operating most flights as normal, but has cancelled all services to Iran and Iraq, while British Airways is operating services via Doha.
Plane chartering company Air Charter Service (ACS) has been asked to relocate staff for a number of companies based in Hong Kong and China.
Gavin Copus, CEO of ACS Asia Pacific, said one Chinese company had chartered a 400 seat Boeing 777-300 to relocate their staff from Tokyo to Hong Kong.
“Their office in Tokyo was having problems with intermittent power and the company was worried about their staff’s general well-being following the radiation leaks,” he said.
“We have also chartered a Boeing 747 leaving today. It’s not going to be the last of these sort of flights either – we have a few more booked, all flying over the coming days from the Tokyo area.”
Copus said that while Tokyo’s Haneda and Narita Airports are open, most people are migrating to the south and heading towards Osaka and Nagoya.