The headline figure combines several kinds of announcement. The government said the package included more than GBP9bn in infrastructure and financial services, up to GBP9bn in offshore wind and separate company-level commitments. It also described the package as creating tens of thousands of jobs and more than GBP18bn in economic gains, language that should be read as government attribution rather than independently audited realised investment.
The meeting came as Prime Minister Keir Starmer hosted Japanese Prime Minister Sanae Takaichi at Downing Street ahead of the G7 summit. The Guardian, citing PA Media and Downing Street, also reported on June 13 that more than 10 commercial and government agreements were expected, including a GBP9bn offshore wind deal and a Rolls-Royce collaboration with the Japan Atomic Energy Agency.
Table: Named UK-Japan investment announcements
| Company or programme | Sector | Announced amount | Status described by UK government |
|---|---|---|---|
| Mitsubishi Estate | Property development | GBP2bn over five years | UK pipeline with GBP5.3bn gross development value |
| Mitsui Fudosan | Property development | GBP3.8bn over five years | UK pipeline with GBP5.8bn gross development value |
| Nomura Real Estate | Property and housing | GBP500mn over five years | Investment commitment; L&G London housing site also cited |
| Mizuho Financial Group | Financial services | GBP3bn ambition | Expansion of UK operations over coming years |
| Eisai | Life sciences manufacturing | GBP48mn | Hatfield packaging facility, subject to final terms |
| Hitachi Energy UK | Grid infrastructure | GBP18mn | Stafford facility and at least 500 jobs over five years |
| Offshore Wind Compact | Floating offshore wind | Up to GBP9bn | Japanese investment linked to 5.9GW of projects |
Source: UK government press release and notes to editors, June 2026.
The official breakdown shows why the headline total needs careful handling. Mitsubishi Estate and Mitsui Fudosan are described as five-year investment pipelines with separate gross development values. Nomura Real Estate's GBP500mn commitment is listed alongside a Legal & General London housing project funded in partnership with Nomura Real Estate Development. Mizuho's figure is described as an ambition to deploy GBP3bn over coming years, including the recent acquisition of Augusta & Co Ltd.