Japanese officials have arrested two Australians living in the outer suburbs of Tokyo on drug charges.

The two Australians are among seven foreigners arrested by Tokyo police for possession of cocaine and marijuana.

All of them are reported to be teachers at branches of a prominent English language school.

The two Australians are 36-year-old Adam Charles Renwick and 28-year-old Daniel Enrique Tapia, both living in the Saitama prefecture, north of Tokyo.

Australia's embassy in Tokyo says it is aware of the case and it is offering consular assistance.

The men could face jail terms of up to five years if they are found guilty under Japanese law.

THE Federal Government says two Australians have been arrested for drug offences in Japan.

A Department of Foreign Affairs and Trade (DFAT) spokeswoman said two Australian men were arrested for "alleged narcotics related offences".

"The Australian embassy in Tokyo has sought access to the men and will provide consular assistance if requested," the spokeswoman said.

Foreign news services earlier reported an Australian man who teaches English in Japan was arrested with five colleagues on suspicion of possessing cocaine and cannabis.

The six foreign nationals were all said to be English teachers at language schools.

Adam Renwick, a 36-year-old Australian living in Kawagoe, and five other foreign nationals were suspected of possessing about 1.5g of cocaine and 8.2g of cannabis.