Tokyo headline CPI at 1.9% y/y, in line with forecasts, easing slightly from July (2.0%). Core CPI (ex fresh food) at 1.8%, above consensus (1.7%), accelerating from July's 1.7%. Core-core, the BOJ's preferred gauge (ex fresh food and energy), at 2.0%, up sharply from 1.8% in July, just touching the BOJ's target.

Wholesale inflation spiked to 7.2% y/y in July, suggesting Middle East related cost pressures are still working through the pricing chain with a lag. This points to further upward pressure on consumer prices in coming months, even without a fresh shock.

The BOJ raised rates to a 31 year high of 1% in June, held steady in July but used notably sharper language on inflation risk. Reuters sources indicate the BOJ is now positioned to hike as soon as the September 17-18 meeting, and may even consider a faster tightening pace than its usual roughly twice yearly cadence.

Tokyo data typically leads the nationwide trend by several weeks, making it a closely watched early signal ahead of each BOJ decision.

Bullish bias reinforced for the yen. A third consecutive above-forecast print, combined with sources pointing to a possible faster tightening pace, solidifies the September hike scenario. USD/JPY: likely downward pressure, particularly worth watching against the already fragile dollar narrative (Treasury buybacks, Bessent/Warsh divide). EUR/JPY, GBP/JPY: the yen could become the most directional currency in the bloc if the BOJ confirms a more aggressive pace than expected.

The market already prices in a September hike to some degree, so the reaction could be asymmetric, stronger on confirmation of an accelerated pace than on a plain 25bp hike matching expectations. The lag between wholesale and consumer inflation remains the key factor to track ahead of the meeting.

Sources