Japan's remaining 12 stealth jets are grounded for now, he added.
"The Defence Science and Technology Agency's (DSTA) assessment is that now is an opportune time to put in Singapore's request", Minister Ng said, noting that the price of the F-35 has been "steadily falling" due to "healthy orders" from the U.S. and 10 other countries.
"A total of eight aeroplanes were sent to the area, but we have not received any information about the fighter". In November a year ago, Defence Secretary Gavin Williamson announced that the United Kingdom was doubling its fleet of F-35 fighters by ordering 17 more jets.
The F-35A stealth jet disappeared from radar while flying off the eastern coast of Aomori and parts of the jet were found late on Tuesday, the Air Self-Defence Force said.
Warrior Maven Kris Osborn gives an inside look into the Lockheed Martin F-35 construction facility in Ft.
The aircraft was less than a year old when it crashed, and is only the second F-35 to do so in the two decades it has been flying.
Japan's fleet of F-35s promises to become the largest outside of the U.S.
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Japan plans to buy 147 Lockheed-Martin-made F-35s, majority F-35As, over the next decade.
The crash was only the second time an F-35 has gone down since the plane began flying nearly two decades ago.
Japan has deployed F-35As, each of which costs over 10 billion yen (A$126 million) to replace the ageing F-4 fighter jet. The aircraft crashed in waters that reach a depth of around 1,500 meters, making recovery hard, the spokesman added.
A U.S. Defense Department spokesman said the Pentagon was aware of the reports but declined to comment. A U.S. Marine Corp short take off and landing (STOVL) F-35B version crashed near the Marine Corps Air Station Beaufort in SC in September, prompting a temporary grounding of the aircraft.
The F-35C model is the US Navy's version, designed for use off its aircraft carriers.All contain an advanced electronic warfare suite which can allow seamless integration among users within one military or among allies.