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UK, Japan set to agree $24 billion investment, tech partnerships

Published by Global Banking & Finance Review

Posted on June 13, 2026

2 min read

· Last updated: June 14, 2026

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UK, Japan agree tech partnership and vow fighter jet progress

Britain and Japan Forge Closer Ties in Technology, Defence, and Economy

Leaders Announce New Tech Partnership

LONDON, June 14 (Reuters) - The leaders of Britain and Japan announced a tech partnership on Sunday designed to boost national security and create jobs, and pledged to speed up the progress of their next generation fighter jet, GCAP.

High-Level Meeting in London

Japanese Prime Minister Sanae Takaichi joined British Prime Minister Keir Starmer in London on Sunday, along with a group of business leaders to discuss ways to deepen cooperation in areas including tech, green energy and defence.

Major Investment Announcements

Alongside announcements totalling £18 billion ($24 billion) on infrastructure, financial services and wind power, Takaichi said deep security ties were at the foundation of the countries' relationship.

Security and Defence Cooperation

"We concluded to further accelerate the progress of the Global Combat Air Program GCAP, which is the cornerstone of our security cooperation," she said through a translator.

Details of the GCAP Initiative

GCAP is an effort to build a next-generation fighter to be developed ​by a joint venture of Britain's BAE Systems, Italy's Leonardo and ​Japan Aircraft Industrial Enhancement, which is backed by Mitsubishi Heavy Industries.

Starmer's government, which is locked in a dispute over the need to spend more on defence, had said the two leaders would confirm their shared commitment to the project and discuss the launch of its next phase, with an international contract due to be signed by the end of the month.

Broader Areas of Cooperation

Starmer, who could face a leadership challenge in the coming months, and Takaichi also announced a raft of projects they said would help build cooperation in areas such as AI, space, quantum computing and cybersecurity.

Corporate Partnerships and Economic Impact

Included in the partnership are export deals for certain companies, manufacturing tie-ups and research projects involving some of the biggest corporate names in Britain and Japan such as Rolls-Royce, BAE and NEC Corporation.

"These landmark agreements will bring multi-billion pound investment into the UK, creating tens of thousands of new jobs and driving new developments," Starmer said.

Additional Information

($1 = 0.7459 pounds)

(Reporting by Sam Tabahriti and Kate Holton; Editing by Emelia Sithole-Matarise and Helen Popper)

Key Takeaways

  • Japan will commit over £9 billion in a five‑year investment pipeline targeting UK infrastructure and financial services.
  • An additional £9 billion will be unlocked for offshore wind expansion, expected to add 5.9 GW across Scotland and the Celtic Sea.
  • New technology partnership will span AI, semiconductors, quantum computing, alongside separate announcements from Hitachi Energy, Rolls‑Royce and Eisai covering power grids, SMRs, and life sciences.

Frequently Asked Questions

What is the value of the new UK-Japan investment partnership?
The UK and Japan are set to agree on investments and technology partnerships worth more than £18 billion ($24 billion).
Which sectors are highlighted in the UK-Japan partnership?
Key sectors include infrastructure, financial services, offshore wind projects, AI, semiconductors, and quantum computing.
How much investment is planned for UK offshore wind projects?
Up to £9 billion is planned to support offshore wind projects, specifically for 5.9 gigawatts of capacity.
Which companies are involved in additional investments?
Companies such as Hitachi Energy, Rolls-Royce, and Eisai are announcing investments in areas like power grids, nuclear technology, and life sciences.
When and where will further agreements be signed?
Further business and government agreements are expected during Prime Minister Takaichi's visit to the UK, ahead of the June 15-17 G7 summit in France.

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