ROME, June 15, 2026 — Japanese Prime Minister Sanae Takaichi and Italian Prime Minister Giorgia Meloni agreed Sunday to accelerate collaboration on the Global Combat Air Programme — the joint next-generation fighter aircraft project involving Japan, Italy, and the United Kingdom — during a bilateral summit at Villa Doria Pamphili in Rome that deepened the two countries’ “special strategic partnership” across defense, economic security, and space.
“On security matters, we agreed to accelerate collaboration related to the joint development of next-generation fighter aircraft (GCAP) among Japan, Italy, and the United Kingdom,” Takaichi wrote on X summarizing the summit. The two leaders also described Japan’s participation in the Messina Strait Bridge Construction Project as “a major endeavor symbolizing future economic cooperation” between the two countries.
What GCAP Is
The Global Combat Air Programme is a trilateral defense project between Japan, Italy, and the United Kingdom to develop a sixth-generation stealth fighter aircraft intended to replace Japan’s F-2s, Italy’s Eurofighter Typhoons, and Britain’s Typhoons in the 2030s and beyond. The programme was formally announced in December 2022, combining two previously separate next-generation fighter initiatives — the UK-Japan Future Fighter programme and Italy’s involvement through the Tempest project — into a single trilateral effort.
GCAP represents one of the most significant defense industrial collaborations between Asia and Europe in history. It brings together three of the world’s most advanced aerospace industries — the UK’s BAE Systems and Rolls-Royce, Japan’s Mitsubishi Heavy Industries and IHI, and Italy’s Leonardo — under a single programme structure governed by a new international organization. The aircraft is intended to incorporate advanced stealth, hypersonic capability, artificial intelligence integration, and next-generation engine technology that no single nation could afford to develop independently.
What the Acceleration Means
The agreement to “accelerate” GCAP collaboration comes at a critical juncture in the programme’s development. The three nations established the GCAP International Government Organisation (GIGO) in December 2024 as the body responsible for managing the joint programme, and design work is ongoing. Key decisions about workshare distribution — how production work is divided among the three countries’ defense industries — have been among the most sensitive negotiations.
Takaichi’s agreement with Meloni to accelerate collaboration signals that both governments want to move faster on the programme’s development timeline rather than allowing workshare negotiations to delay technical progress. Japan has been particularly focused on ensuring its domestic defense industry gains meaningful technology transfer through GCAP, as the programme represents Japan’s most significant opportunity to develop indigenous sixth-generation fighter capability alongside allied partners.
The Rome Summit as a Follow-Up to Tokyo
Sunday’s Rome summit was the direct follow-up to a January 16, 2026 summit in Tokyo between Takaichi and Meloni that elevated Japan-Italy relations to the level of “special strategic partnership” — a designation that reflects the depth of cooperation across defense, economic security, and technology. The Japan-Italy Joint Statement from that January meeting had already identified GCAP as a central pillar of the bilateral relationship, alongside critical minerals cooperation, space, and semiconductors.
Meloni invited Takaichi to visit Rome at the January summit, and Sunday’s meeting fulfilled that invitation — with the two leaders meeting at the historic Villa Doria Pamphili, a 17th-century palace and gardens in Rome. The official summary from Japan’s Prime Minister’s Office confirmed the GCAP acceleration agreement alongside the signing of a Joint Statement on Space Cooperation, a Memorandum of Cooperation on Supply Chain Resilience, and a Statement of Intent on science and technology cooperation between the two countries’ education and research ministries.
The Strategic Context — NATO, the Indo-Pacific, and GCAP’s Significance
GCAP is strategically significant beyond its military capability. It represents a concrete institutional link between a NATO member (Italy), another NATO member with a close US alliance (UK), and Japan — a non-NATO Indo-Pacific partner that has been deepening its security ties with European democracies as China’s military power grows. Japan formally joined the UK and Italy in GCAP precisely because all three nations face a version of the same challenge: the need to develop advanced air combat capability against peer adversaries that their existing platforms cannot address.
The programme also carries industrial policy significance. Both Japan and Italy have identified GCAP as a vehicle for developing domestic defense aerospace capabilities that would otherwise be prohibitively expensive to fund alone. For Italy, GCAP is the flagship of its defense industrial modernization under Meloni’s government — an effort she has framed as central to Italy’s role as a serious European security actor rather than a passive beneficiary of American protection.
Takaichi’s European Tour and the G7 Context
The Rome summit was part of Takaichi’s broader European diplomatic tour ahead of the G7 Summit in Évian, France — a tour that also included a stop in the United Kingdom. The sequence — UK, then Italy — mirrors the GCAP partnership structure, with Takaichi reinforcing the trilateral programme’s political foundations at the leadership level before arriving at the G7 table.
Japan’s deepening engagement with European security partners reflects a broader strategic reorientation that has accelerated under Takaichi. Japan has committed to nearly doubling its defense spending to approximately two percent of GDP by 2027, acquired Tomahawk cruise missiles for its Maritime Self-Defense Force destroyers, and developed a counterstrike capability — all while deepening institutional defense ties with European partners through GCAP and bilateral agreements like the one signed in Rome on Sunday.