Tokyo, May 8, 2026, 22:08 (JST)
- Research funding for the F-47 is set to top $5 billion in fiscal 2027, according to U.S. Air Force budget documents, with projections closing in on $5.3 billion for fiscal 2028.
- The F-2 fighter is expected to leave service by roughly 2035, according to Japan’s Ministry of Defense, so the GCAP timeline isn’t just a matter for industry—it’s a real operational concern.
- GCAP has entered its initial joint contract. However, lingering worries from Japan about delays leave U.S.-made alternatives like the F-35—and even the not-yet-finished F-47—still in play.
Japan’s fighter jet decision faces renewed attention now that Boeing’s F-47 is picking up funding support in the U.S. Tokyo, meanwhile, is pressing ahead with its joint fighter initiative alongside Britain and Italy—both pushing toward the 2035 target to phase out the Mitsubishi F-2.
That question is pressing now, with Japan’s available options shrinking. The defence ministry points to the F-2’s planned retirement around 2035, and warns that total dependence on foreign suppliers for air power could erode Japan’s own operational control. The solution, at least on paper, is GCAP—the Global Combat Air Programme. The initiative has Japan, Britain and Italy working together on a sixth-generation fighter. Think stealth, extended range, sophisticated sensors, and close integration with uncrewed aircraft.
The F-47 is getting a serious bump in U.S. funding. According to Air & Space Forces Magazine, the Air Force’s budget request tops $5 billion for research, development, test, and evaluation in fiscal 2027—up from almost $3.5 billion penciled in for fiscal 2026. Spending is then projected to hit close to $5.3 billion in fiscal 2028. “A surge for development,” is how Heather Penney at the Mitchell Institute put it. Air & Space Forces Magazine
GCAP isn’t on hold. The GCAP Agency has handed Edgewing—a collaboration backed by BAE Systems, Leonardo, and Japan Aircraft Industrial Enhancement Co—a first joint international contract, valued at 686 million pounds, covering design and engineering. “An important moment for GCAP,” said agency chief executive Masami Oka. Edgewing’s CEO Marco Zoff added the group was “carrying this momentum forward.” Leonardo
The funding issue still lingers. Last month, the Financial Times said Japan grew uneasy over slow-moving British funding, which is linked to the UK’s broader defence budget shortfall. An interim GCAP contract, the paper reported, is bridging the gap for now as bigger plans remain unresolved.
Last year, Reuters noted Japan’s increasing uncertainty about hitting the 2035 GCAP fighter deadline, according to two people familiar with the country’s air defense talks. Tokyo was weighing interim fixes—either buying more Lockheed Martin F-35s, or refurbishing its aging F-2 fleet. At the time, the nation’s acquisition agency insisted the 2035 goal still stood and said it hadn’t heard of any fresh F-35 orders in the works.
The F-47 found its way into the conversation via both political channels and procurement debates. According to Reuters, Japanese media reported U.S. President Donald Trump talked up Boeing’s planned F-47 during discussions with Prime Minister Shigeru Ishiba, urging Japan to look at American-made jets. Meanwhile, Japan’s trade negotiator Ryosei Akazawa floated the idea that defense buys could factor into trade negotiations since those purchases would feed into the U.S. trade surplus.
Even so, picking up the F-47 wouldn’t just be a straightforward replacement. According to the U.S. Air Force, Boeing’s contract is focused on engineering and manufacturing development, with plans only for a handful of test jets meant for assessment. The aircraft is still shrouded in secrecy, and there’s been no word from Washington about a version destined for Japan.
Boeing clinched a big victory with the F-47, edging out Lockheed Martin for the coveted Next Generation Air Dominance contract—a project set to replace the F-22 and integrate combat drones. Steve Parker, head of Boeing’s defense unit, described the move as “the most significant investment” the company has ever made in its defense arm to gear up for the effort. Reuters
GCAP’s got competition coming from more than just Boeing. Back in February, Italy’s parliament signed off on 8.77 billion euros for the program’s early stages, but early-phase costs have now ballooned to 18.6 billion euros—up from around 6 billion euros at 2021 prices, according to Reuters. Over on the continent, Europe’s FCAS effort—France, Germany, Spain—has hit its own turbulence thanks to tensions between Dassault Aviation and Airbus. All this has turned these sixth-generation fighter projects into a grind, testing not only technical teams but also the political will to see them through.
Japan finds itself weighing costs with every path forward. Holding out for GCAP means keeping control at home—domestic jobs, the right to tweak the aircraft as it sees fit. But going with U.S. platforms? That might help avoid schedule slips, yet it opens the door to tougher export rules, limits on upgrades, and a heavier reliance on Washington. There’s also the F-47’s own schedule to consider. Penney pointed to funding trends hinting at flight tests by 2029, but so far, the program hasn’t delivered an operational aircraft.
Japan is still officially aligned with GCAP for the moment. Yet with the U.S. pouring money into Boeing’s F-47, the landscape has shifted—Tokyo’s project now faces pressure to actually deliver by 2035, not just talk about it.
