A United States Osprey military aircraft with eight crew members on board crashed on Wednesday off the coast of Japan, the coastguard said.
โWe received information at 2:47 pm (0547 GMT) today that the US militaryโs Osprey crashed off Yakushima Island,โ a spokeswoman told a news agency.
โWe were also notified that eight crew members were on board,โ she added.
โThere is no further information at the moment.โ
However, no casualty has been reported.
The island of Yakushima lies south of Japanโs southernmost main island, Kyushu.
Japanese broadcaster NHK reported that the Osprey departed from the Iwakuni US base in the Yamaguchi region and headed for the Kadena base in Okinawa.
NHK also cited defence ministry sources as saying that the aircraft was a CV-22 Osprey belonging to Tokyoโs US Yokota air base.
The tilt-rotor Osprey aircraft has a troubled history, with a string of fatal crashes over the years.
Four months ago, a plane crash in northern Australia killed three US Marines among the 23 on board.