Japan's revised GDP and a 29-year wage jump rebuild the case for a BOJ hike

Japan's second-quarter GDP was revised higher on 8 September, and July wage data showed the steepest rise in nearly thirty years. Together the two prints give the Bank of Japan more cover for another rate increase after years in which officials said they were waiting for wages and prices to move together.

The first GDP estimate had already shown the economy expanding. The revision lifted the quarterly pace and, with it, the annualised rate that markets use as shorthand. Private consumption and capital expenditure were the lines economists watched. A soft consumption number would have kept the BOJ cautious. A firmer one, next to the wage print, is the combination the board has described in its own statements as the condition for tightening.

July cash earnings jumped at the fastest pace since the mid-1990s. That series includes overtime and bonuses, so a single month can flatter. The direction still matters. Spring shunto settlements had already come in high by Japanese standards. The July figure is the first look at whether those settlements are reaching take-home pay in the summer numbers, not only in April headlines. If regular pay, not only special payments, is up, households have a reason to spend. If it is bonuses, the BOJ has a noisier series.

What a hike would change

Japan's policy rate remains low against the Federal Reserve and the European Central Bank. That gap has been one reason the yen has stayed weak and import prices have stayed high. A hike would narrow the gap a little. It would also test banks that have built books around cheap yen funding and test the Ministry of Finance, which pays interest on a very large stock of government debt. Those are the two domestic constraints every BOJ board member can recite.

The yen's path also sits inside the political calendar. Sanae Takaichi wants a conversation with Donald Trump around the UN General Assembly on 22 September, before a 24 September meeting between Trump and Xi Jinping in Washington. Currency talk will be on that list whether Tokyo schedules it or not. A BOJ that looks ready to lift rates is a different counterpart in any yen discussion than a BOJ that is still describing the data as inconclusive. That is why a statistical revision on a Tuesday morning is a political fact by Tuesday afternoon.

Households will feel any move through mortgage rates and through the import bill. Exporters will feel it through the exchange rate. Regional banks that lent against near-zero funding will have to reprice. None of that is new. What is new is that the two data series the board named as its hurdle have, on the same morning, moved in the direction it asked for.

The next scheduled policy meeting will be read against these two prints. Traders will argue over whether one wage month is enough. The board has spent two years saying it needs a run of data, not a spike. The revised GDP and the July earnings number are now part of that run. They do not compel a move. They remove the easiest reason not to make one.