The federal government remains concerned for 11 Australians still unaccounted for in quake- and tsunami-devastated Japan.
Foreign Minister Kevin Rudd said embassy officials were working around the clock to confirm their safety.
"We are determined to do everything humanly possible to reduce that number right down," Mr Rudd told reporters on Friday.
The Department of Foreign Affairs and Trade (DFAT) said the 11 were believed to have been in the worst-affected areas when the tsunami struck.
There are still no reports of Australian casualties. But, earlier on Friday, Mr Rudd warned Australians might still be among the dead.
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The government has told Australians to leave Tokyo and surrounding areas because of radiation risks from the earthquake-damaged reactors at the Fukushima nuclear power plant.
The travel advice also cites ongoing aftershocks and the damage to roads, buildings and communications as reasons to leave the Japanese capital and northern Honshu.
Mr Rudd said that while "large numbers" of Australians had already left, about 1500 remained in the greater Tokyo area. He said there was plenty of space on commercial airlines out of Japan.
But, he added, no Australian would be left behind if they could not afford a flight.
"If people are experiencing practical difficulties on the ground they should contact our embassy team."
Meanwhile, an Australian fire and rescue officer in the field was expected to be airlifted to a US airforce base for medical treatment after a search dog bit him on the face.
Fire and Rescue NSW Commissioner Greg Mullins said the man had been trying to help the dog after it became entangled in debris.
"Unfortunately, while extricating the dog, it became frightened and has bitten the officer on the face," Mr Mullins said.
The man was in a stable condition.
