The U.S. military's Osprey aircraft arrived in Japan early Monday as residents rallied against their deployment after recent crashes raised safety concerns.
Live television footage showed 12 MV-22s being unloaded from a cargo ship at the U.S. Marines' base in Iwakuni, Yamaguchi Prefecture.
Local protesters in a dozen small boats demonstrated against the controversial aircraft's arrival, chanting "We don't want the dangerous Osprey!" and "Osprey, go back to America."
The demonstration against the unloading of the aircraft would continue throughout the day, protest organizer Kiyoshi Oka told AFP by telephone.
Although local governments in Japan have no legal grounds to reject the U.S. deployment plan, strong local resentment, from Okinawan islanders in particular, could further erode public support for the government of Prime Minister Yoshihiko Noda.
The U.S. military plans to fully deploy Osprey aircraft to Okinawa in October, even though the governor of the island chain has rejected the plan because of safety concerns.
Following checkups at Iwakuni, the aircraft is destined for the Marine Corps airbase of Futenma in Okinawa, which has been at the center of a long-running stand-off as it sits in a developing urban area.
A separate rally was held outside the Futenma base Monday with protesters holding banners that said "We are opposed to deployment," Jiji Press reported.
Concerns over the Osprey came after the two countries clinched a deal earlier this year under which the United States will shift 9,000 Marines out of Japan in a step designed to ease friction with Tokyo over the U.S. military footprint.
The Osprey is a hybrid aircraft with rotors that allow it to take off like a helicopter and engines that can tilt forward, enabling it to fly like an airplane at greater speed than a chopper.
The aircraft was plagued with problems in its early years in the 1990s, but U.S. officials say the technical glitches have been cleared up and the US Marine Corps says it has proven invaluable.
A U.S. Air Force CV-22 Osprey crashed in Florida in June, injuring all five crew members. U.S. officials said the accident was not due to mechanical problem.
In April, an MV-22 Osprey -- the variant that arrived in Japan -- crashed in Morocco, killing two Marines.
The mayor of Iwakuni as well as three members of Noda's Democratic Party of Japan have also voiced their opposition to the Osprey deployment.
U.S. Deputy Defense Secretary Ashton Carter told Japanese media Saturday that Washington had agreed to provide ongoing safety information about the Osprey to Tokyo, and added that "safety is a very important issue."
Japanese Defense Minister Satoshi Morimoto was quoted as saying on Sunday that any delay in deployment "would cause a hole in operations of (the U.S.) forces".
"I'm relieved that there was no chaos in unloading (the Osprey)," Morimoto told reporters on Monday.© 2012 AFP