UK Prime Minister Keir Starmer and Japanese Prime Minister Sanae Takaichi met at Downing Street to discuss a joint fighter-jet project and technology partnerships.
The meeting signals a significant shift in bilateral cooperation, combining defense strategy with a massive economic infusion intended to modernize industrial capabilities in both nations.
The leaders are poised to agree on an investment and technology partnership valued at £18 billion [1], which is approximately $24 billion [1]. This financial commitment is expected to create tens of thousands of jobs [1] across the two countries. The deal focuses on scaling technology infrastructure, and fostering innovation in emerging sectors.
Beyond the economic agreement, the two prime ministers focused on defense cooperation. A central point of the discussions involved a joint fighter-jet project, intended to strengthen security ties and shared military capabilities between London and Tokyo.
The meeting took place on Sunday, June 16, 2024, at Downing Street in London. The discussions aim to solidify economic ties and ensure that both nations remain competitive in the global technology landscape while addressing mutual security concerns.
Representatives from both governments said the partnership will advance bilateral cooperation on defense and seal a landmark investment deal to generate employment and strengthen economic ties.
“UK and Japan are poised to seal a landmark £18 billion investment deal.”
This partnership represents a strategic alignment between the UK and Japan to counter regional security threats and economic stagnation. By linking high-tech investment with defense procurement, such as the fighter-jet project, both nations are integrating their industrial bases to reduce reliance on third-party suppliers and strengthen their geopolitical alliance in the Indo-Pacific and European spheres.



