Rescuers in Japan are still searching for 15 people missing after what the government is calling the worst typhoon to hit the islands in 25 years.

The death toll from Typhoon Tokage now stands at 77, with more than 280 injured.

Many people died in landslides set off by the heavy rains, while others died in flooding or were swept away by massive seas.

Authorities say more than 20,000 homes were flooded, scores of houses destroyed and transport services disrupted across the country.

The government has promised help for affected areas and is sending officials to survey the damage.

The typhoon - the 10th such storm to hit Japan this year - has moved out into the Pacific where it has been downgraded to a tropical depression.

The Japanese government says the country has suffered $9.3 billion US in damage from the storm season.

(with files from Australian Broadcasting Corporation)