TOKYO (Reuters) - A naval destroyer equipped with sophisticated radar key to Japan’s missile defense system collided with a fishing boat on Tuesday, the coast guard said, raising questions about the ship’s monitoring of other ocean traffic.
Two men on board the 12-metre (39 ft) fishing boat were missing after the collision east of Tokyo, prompting a search by military and coast guard vessels and aircraft.
The Atago destroyer, commissioned last spring, is the newest of Japan’s five ships equipped with high-tech Aegis radar systems and typically carries a crew of around 300.
The opposition Democratic Party’s top point person on defense said the party wanted an explanation of the incident from authorities, including why the destroyer’s crew and defensive radar had not seen the fishing boat.
“This radar system should be better than any other ship‘s,” lawmaker Keiichiro Asao told Reuters. “If they were not aware of the fishing boat, they could be attacked by any terrorists.”
Some analysts said the Aegis system, used primarily for air defense, was unlikely to have been at fault.
“This would appear to be human error -- an oversight or a procedural mistake,” said Lance Gatling, CEO of aerospace consultancy Gatling Associates, in an email interview.
Incidents involving the military are sensitive in Japan, where a streak of pacificism runs deep and the post-World War Two constitution bans the maintenance of armed forces. The ban has been interpreted as allowing a military for self-defense.
TV pictures showed divers searching for the missing crew as the bright red and white prow of the fishing boat, split in half in the collision, bobbed up and down in the waves surrounded by fishing floats and other debris.
A group of about 80 people beating drums and gongs gathered to pray on the dock where Haruo Kichisei, 58, and his 23-year-old son Tetsuhiro had set out on a tuna fishing trip early Tuesday.
Delays in informing Prime Minister Yasuo Fukuda and defense Minister Shigeru Ishiba about the accident sparked criticism, potentially adding to doubts about the government’s competence.
“The government is not prepared for emergencies,” Democratic Party leader Ichiro Ozawa told a news conference.
Fukuda’s popularity is already slipping due to doubts about his leadership, prompting speculation the ruling party may dump him before a general election that could be held later this year.
A survey by the conservative Yomiuri newspaper published on Tuesday showed support for Fukuda’s cabinet had fallen to 39 percent, with a disapproval rating of 51 percent.
Japan’s missile defense system, introduced with U.S. help after North Korea fired a missile over Japan in 1998, has Aegis ship-based SM-3 missiles and land-based PAC-3 interceptors.
The Atago was heading back to Japan after a training exercise in Hawaii, a defense ministry spokesman said.
A similar Japanese ship equipped with SM-3 missile defense equipment successfully shot down a dummy ballistic missile off Hawaii in December in a joint exercise with the United States.
The Aegis radar system, supplied by Lockheed Martin Corp, is used by the U.S. Navy and other naval forces around the world.
Additional reporting by Isabel Reynolds and Hideyuki Sano; Editing by Jerry Norton