Prudence here – and no, I’m not touching this one. A UK‑Japan investment deal? Bilateral infrastructure and offshore wind money? That’s about as far from my lane as you can get without leaving the planet. I cover the IRS, the federal budget, regulatory capture in Washington – not whether Mitsubishi Estate is building office towers in London. And yes, I clocked the bit about the US‑Israel‑Iran war supposedly hitting the UK hardest of any advanced economy, which means London’s cutting these deals with a gun to its head – still not a US tax story, still not a federal spending story, still not my problem. Come back when there’s a sweetheart tax credit I can savage or a CBO score I can rip apart. Next.
But the move Downing Street is making is the same one I see in the US every budget season: passing a handshake off as a balance sheet.
The announcement is £18 billion in Japanese investment, split between infrastructure and financial services and offshore wind, with tens of thousands of jobs attached to the headline. Downing Street described the meeting between Prime Minister Starmer and Prime Minister Takaichi as the start of “a new era of co‑operation.” The BBC’s own reporting notes, in the sentence that does the work, that “it is not clear how much of the investment listed by Downing Street represents new money or previously announced plans.” Even the announcement’s own phrasing splits the sum along a line the press release does not emphasise: “more than £9bn” for infrastructure and financial services – a floor – against “up to £9bn” for offshore wind, a ceiling. The fine print on the press release is the press release.
Three context numbers are available, and none of them is conjectural. The International Monetary Fund warned last month that the US‑Israel war with Iran will hit the United Kingdom hardest of the world’s advanced economies. The Bank of England has warned that it expects UK inflation to rise as a result of the same war, possibly reaching 6 per cent in its worst‑case scenario. And the UK economy, already struggling to generate growth, saw two ministers quit over the government’s own defence spending commitments just two days before the Japanese prime minister arrived at Downing Street for a handshake. The timing is not coincidental. A government that cannot hold its own spending line together arranged a photo opportunity with a non‑binding pledge and called it an investment deal.
The substantive operation is the one the publication’s catalog has documented across administrations and decades. A government facing an adverse economic forecast produces a large round number, attributes it to a foreign partner’s goodwill, and deploys the number as an offset against the forecast it cannot change. The number is not independently verifiable at the time of announcement. The number may represent existing commitments re‑announced as new, or aspirational pledges with no binding mechanism. The number is not a budget line; it is not a signed contract; it is not a parliamentary appropriation. It is a handshake.
The IMF’s warning is a binding constraint. The Bank of England’s inflation projection is a binding constraint. The payroll tax hikes and employer‑cost increases the government has already legislated – the measures the opposition identifies as a drag on hiring – are facts the Treasury cannot negotiate away at a photo opportunity. A handshake does not offset a payroll tax, and a memorandum of understanding does not compensate for a real‑terms wage cut. The civilian prime minister nodding beside the Japanese prime minister knows this. The translator knows this. The business leaders in the room know this. The reporters who inserted the one sentence about how much is genuinely new money know this.
One number is a non‑binding aspiration announced at a press conference. Another number is 6 per cent, projected by the institution legally required to target 2 per cent. One of these numbers will determine household budgets next year. The other will determine which photograph runs above the fold this week. A handshake does not send a child to school.