Japan Wants to Build It’s Own Stealth Sixth-generation X-2/F-3 Fighter Jet

TOKYO – Japan wants to develop a stealth fighter domestically, rejecting designs from Lockheed Martin and Boeing in the United States and Britain’s BAE Systems, sources with knowledge of the programme told Reuters.

The Japanese Ministry of Defense’s (MoD’s) Acquisition, Technology & Logistics Agency (ATLA) has confirmed to Jane’s that it plans to pursue a Japan-led development project of a next-generation fighter aircraft, rejecting proposals by foreign manufacturers, including the one by Lockheed Martin to develop a new stealthy aircraft by combining elements of the F-22 and F-35 fifth-generation fighters.

Tokyo aims to replace the Japan Air Self-Defense Force’s (JASDF’s) Mitsubishi F-2 fighter aircraft with a future fighter in the 2030s.

The US offer is known to include a ‘hybrid’ of technologies and design features from the Lockheed Martin F-22 Raptor multirole fighter and the F-35 Joint Strike Fighter, although companies including Boeing and Northrop Grumman also responded to the RFIs and would likely play a role in an inter-government project.

The UK partnership offer would be led by BAE Systems but would similarly involve other UK companies. This would be framed around some of the technologies and design features of the Tempest conceptual fighter that the UK is planning to develop.

Japan’s partner on the F-X programme – either the US or the UK – is expected to be formally announced later this year. In December 2019 the MoD in Tokyo released this ‘conceptual image’ of the new fighter. Source: Japanese MoD.

The rejection of proposals offered by industry giants from USA and Great Britain would put Japan’s leading defence contractor, Mitsubishi Heavy Industries, in the lead for a military contract worth more than US$40 billion (S$57.3 billion). The company has not submitted a design for the next-generation fighter, but developed Japan’s stealth fighter technology demonstrator, the X-2, in 2016.

“Japan’s stealth designs have performed well in tests so far,” said one of the sources, who has knowledge of discussion about the new proposed plane, referred to as the F-3 or F-X.

A spokesman for Mitsubishi Heavy said the company would work with the government on whatever policy it decided to follow.

“We understand the Japanese government will lead the development programme,” a Mitsubishi Heavy spokesman said.

Japan’s Air Self Defence Force flies about 200 Boeing F-15 jets and is replacing squadrons of decades-old F-4 fighters with Lockheed Martin F-35s. The F-3 will succeed the F-2, a derivative of the F-16 Fighting Falcon jointly developed by Mitsubishi Heavy and Lockheed Martin more than two decades ago.

Proposals from Lockheed, Boeing and BAE “were judged not to have met our needs”, said an official at the Japanese defence ministry’s Acquisition, Technology & Logistics Agency (Atla).”No decision has yet been reached on the airframe,” he added.

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After settling on the airframe – the aircraft itself without the systems that make it fly – Japan’s government will select suppliers for the engine, flight systems, sensors and other components that will give the proposed jet its advanced capabilities, the sources said.

All three spoke on condition of anonymity because they were not authorised to speak to the media.

For many of the systems, Tokyo will need help from foreign companies to reduce development costs and time, ensuring it can deploy the fighter in the next decade to counter Chinese expansion in East Asia.

US companies, including Lockheed Martin, Boeing and Northrop Grumman, are still potential partners, the sources said.Related Story

“Lockheed Martin is encouraged by the ongoing dialogue between the US government and government of Japan regarding Japan’s F-2 replacement plans, and is looking forward to detailed discussions with Japanese industry,” Lockheed Martin said in an email. It had proposed an aircraft combining elements of its F-22 and F-35 stealth jets.

“Boeing is committed to partnering with Japan to support development of a Japan-led, next-generation future fighter,”said a spokesman from Boeing, which had offered Japan a design based on its F-18 Super Hornet jet.

Northrop Grumman is “engaged in frequent dialogue with Japan’s Ministry of Defence and Japanese industry in support of the F-X programme”, a company spokesman said. Northrop Grumman did not submit an airframe proposal.

The United States, which has about 50,000 troops in Japan, including as an aircraft carrier strike group, remains the cornerstone of Tokyo’s defence policy. US President Donald Trump wants Japan to pay more for that protection and reduce its trade surplus with the United States.

Japan is seeking deeper security ties elsewhere, including with Britain, which is courting Japan as a possible partner on its proposed next-generation jet, the Tempest. If built, it would deploy in the 2030s.

The leading defence contractor in that project, BAE, which offered Japan a design based on the Eurofighter Typhoon jet, could stand to benefit.

BAE and other companies involved in Tempest proposal”continue to support the UK in its discussions with Japan to consider more deeply how the two nations can collaborate on their combined combat air requirements”, a BAE spokesman said.

Japan wants to decide on the international partners for the F-3 by the end of the year, the Atla official said.

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