The announcement is a business story because the largest claims are sector and company commitments, not only diplomatic language. The Prime Minister's Office said the package included more than GBP9bn in infrastructure and financial-services investment and up to GBP9bn in Japanese investment into UK offshore wind. The Guardian, citing PA Media, also reported that Starmer and Takaichi were set to agree an GBP18bn package creating tens of thousands of jobs.
The government release describes several categories differently. Some figures are direct investment commitments, some are five-year pipelines, and some are gross development value. Mitsubishi Estate was listed as planning GBP2bn of investment over five years to deliver a UK pipeline with gross development value of GBP5.3bn. Mitsui Fudosan was listed as planning GBP3.8bn of investment over five years for a pipeline with gross development value of GBP5.8bn. Nomura Real Estate was listed with a GBP500mn investment commitment over five years.
Table: Reported UK-Japan investment package
| Company or sector | Reported value | Status described by UK government |
|---|---|---|
| Mitsubishi Estate | GBP2bn investment; GBP5.3bn gross development value | Five-year UK pipeline |
| Mitsui Fudosan | GBP3.8bn investment; GBP5.8bn gross development value | Five-year UK pipeline |
| Nomura Real Estate | GBP500mn | Five-year investment commitment |
| Mizuho Financial Group | GBP3bn ambition | Expansion of UK operations over coming years |
| Offshore wind compact | Up to GBP9bn | Japanese investment to support 5.9GW of UK floating offshore wind projects |
| Eisai | GBP48mn | Hatfield manufacturing expansion, subject to final terms |
| Hitachi Energy UK | GBP18mn | Purpose-built Stafford facility and at least 500 jobs over five years |
| M&G and Daiichi Life Group | GBP4.5bn | Daiichi investment into M&G-managed funds |
Source: UK government announcement, 14 June 2026.
The offshore-wind element is the clearest sector package. The UK government said the compact would help facilitate up to GBP9bn of Japanese investment for 5.9GW of floating offshore wind projects, including Ossian and Green Volt off Scotland's east coast and Erebus in the Celtic Sea. It said those projects, once built, could generate enough electricity to power 8mn homes.