A powerful typhoon is heading toward Tokyo after lashing southern Japan, where it killed at least one US airman on Okinawa island and left two others missing.

Typhoon Phanfone was off the coast of Shikoku in southwestern Japan on Sunday night, packing winds of up to 144 km/h after hitting the southern regions of Okinawa and Kyushu, Japan’s Meteorological Agency said.

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Three US Air Force members were washed away by high waves on Sunday, with one found dead and the other two still missing, Japan’s coast guard said.

Tsuguyoshi Miyagi, an official at the coast guard’s Okinawa branch, said the airmen were on the island’s northern coast.

The US Air Force confirmed that three of its airmen were washed out to sea and that one had died. It said the search for the other two had been interrupted by rough seas.

The names of the three were being withheld pending notification of their relatives.

Okinawa is home to about half the roughly 50,000 American troops stationed in Japan.

Several people on Kyushu island were injured in the typhoon.

The storm also grounded more than 100 flights on Sunday and caused power outages at more than 9500 homes on Kyushu.

The storm triggered concerns of possible landslides on the ash-covered volcano in central Japan that erupted on September 27, killing at least 51 hikers.

The search for a dozen people missing in the eruption was suspended on Sunday due to rain from the approaching storm.

The meteorological agency was predicting up to 40 centimetres of rain in central Japan by Monday morning.