The United Kingdom and Japan have finalised a landmark investment agreement worth £18 billion, further deepening economic ties between the two nations as London seeks to assert its independent trade policy following departure from the European Union. The deal, signed in Tokyo by Prime Minister Rishi Sunak and his Japanese counterpart Fumio Kishida, covers joint ventures in green technology, financial services, and advanced manufacturing.
The agreement is the largest bilateral investment pact Japan has ever signed with a European nation. It is expected to unlock new opportunities for British firms in sectors such as offshore wind, hydrogen, and semiconductors. In return, Japanese companies including Nissan, SoftBank, and Hitachi have pledged expanded operations in the UK, reinforcing confidence in Britain's post-Brexit economic strategy.
Trade between the two countries was already worth £38 billion in 2023. This deal is projected to increase that figure by 20% over five years. It follows the UK-Japan Comprehensive Economic Partnership Agreement signed in 2020, which was the first major trade deal London negotiated independently after Brexit.
Sunak described the agreement as a "significant step forward in our strategic partnership with Japan" and evidence that "Global Britain is delivering tangible results." Kishida noted that the pact demonstrates a shared commitment to economic security and supply chain resilience in an increasingly volatile geopolitical environment.
The deal has been welcomed by British industry groups. The Confederation of British Industry called it a "vote of confidence in the UK as a destination for high-value investment." However, critics question whether the agreement can offset the economic losses from leaving the EU's single market. The Office for Budget Responsibility has estimated that Brexit will reduce UK GDP by 4% in the long term.
Negotiations took 18 months and faced delays over data protection standards and market access for legal services. The final text includes provisions for digital trade and mutual recognition of professional qualifications, which analysts view as a template for future UK deals with other Indo-Pacific economies.
The investment deal is part of the UK's broader pivot towards the Indo-Pacific region, formalised in its 2021 Integrated Review. Japan, the world's third-largest economy, is a key pillar of this strategy alongside Australia and India. The two countries are also negotiating a reciprocal access agreement for defence forces, signalling closer security cooperation.
The agreement now awaits ratification by both parliaments. In the UK, it is expected to pass without major opposition. Implementation is set for early 2025, with the first joint projects in offshore wind and electric vehicle battery production already identified.
