The United Kingdom and Japan finalized a multi-billion-pound investment deal valued at £18 billion aimed at boosting jobs and economic growth in the UK. The announcement came after a meeting on June 14, 2026, at Downing Street between UK Prime Minister Keir Starmer and Japanese Prime Minister Sanae Takaichi [1, 2, 3, 4, 5, 6].

The deal commits Japanese firms to invest over £9 billion in UK infrastructure and financial services and up to £9 billion in offshore wind projects around the UK. The offshore wind funding focuses on developing 5.9 gigawatts of floating offshore wind capacity, which is expected to supply clean electricity to roughly 8 million homes [1, 3, 7, 8, 4, 5, 6].

Rolls-Royce will collaborate with Japan's Atomic Energy Agency on next-generation nuclear technologies, enhancing the UK’s low-carbon energy capabilities. A new technology agreement intends to link UK research and software expertise with Japanese manufacturing strengths [1, 2, 3, 4, 5, 6].

Japanese real estate firms Mitsubishi Estate, Mitsui Fudosan, and Nomura Real Estate plan to inject billions of pounds into UK infrastructure and real estate over the next five years [1, 3, 4, 5, 6]. The deal also reaffirms UK-Japan cooperation on the Global Combat Air Program, a next-gen fighter jet project including Italy [3, 4, 5, 6].

Prime Minister Starmer said, “These landmark agreements will bring multibillion-pound investment into the UK, creating tens of thousands of new jobs and driving new developments.” He added, “This will open a new era of cooperation between our two nations.” Japanese Prime Minister Takaichi described the UK as “an extremely important partner” for Japan [1, 2, 3, 5, 6].

The UK economy grew 0.6% in the first quarter of 2026, the fastest pace in the G7, though growth is expected to slow amid geopolitical tensions. An IMF warning in May signaled that the ongoing US-Israel-Iran conflict could sharply affect UK economic performance in the near term [1, 3, 5, 6].

Conservative shadow business secretary Andrew Griffith welcomed the investment but criticized Labour government policies on taxes and employer regulation as harmful to jobs, saying, “Labour’s tax hikes and employer red tape are doing huge damage, destroying jobs and putting more and more people onto welfare.”

The agreement marks a major economic partnership milestone. The governments and companies involved plan to begin rolling out projects this year and into 2027, aiming to secure long-term job creation and clean energy supply for the UK.