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Summary
Japan's core inflation rose 2.1% in September, topping the BOJ's 2% target for the first time in nine months, according to Reuters.
Higher fuel costs, a weak yen and AI demand pushed prices up, and the core-core index rose to 2.4% from 1.9%.
The BOJ is expected to hold at 1.25% on October 29-30, and Reuters reported it may revise up its inflation forecast.
A December 2025 Barchart analysis said a BOJ hike that lifts the yen could trigger carry-trade selling in US tech stocks.
Gotrade News - Japan's core consumer inflation rose 2.1% in September from a year earlier, topping the Bank of Japan's 2% target for the first time in nine months, according to Reuters on Friday. Higher fuel costs and a weak yen fed the rise, building the case for another BOJ rate hike.
The BOJ raised its policy rate to 1.25% in September in a 7-2 vote, per investingLive, a level Reuters described as a 31-year high. Reuters called the September reading a sign of broadening price pressure.
Japan September CPI: Core 2.1%, Core-Core 2.4%
Underlying inflation picked up faster than the headline. The core-core index, which strips out both fresh food and energy and which the BOJ watches as a better gauge of demand-driven price pressure, rose 2.4% in September after 1.9% in August, Reuters reported. That topped the 2.3% forecast, according to investingLive.
The table below compares Japan's September national consumer price index release with August and with market forecasts, using the figures reported by Reuters and investingLive.
Japan CPI measure (year on year)
August
September
Forecast
Core CPI (excludes fresh food)
1.7%
2.1%
2.1%
Headline CPI
1.9%
2.1%
2.1%
Core-core CPI (excludes fresh food and energy)
1.9%
2.4%
2.3%
Inflation in Tokyo ran hotter still in September, with core CPI at 2.7% and the gauge excluding food and energy at 3.0%, investingLive reported.
Why Did Japan's Inflation Rise Above the BOJ's 2% Target?
Reuters pointed to higher fuel costs from the prolonged Middle East conflict, elevated import prices driven by the weak yen and price pressures from robust AI demand, which it said were blunting the impact of government fuel subsidies. investingLive noted that oil is trading above $110 a barrel.
Despite the reading, Economy Minister Minoru Kiuchi said conditions have not yet been met for the government to officially declare an end to deflation, according to investingLive.
When Is the Next BOJ Meeting?
The BOJ's next policy meeting runs October 29-30, and the central bank is widely expected to keep its rate at 1.25%, according to investingLive. Governor Kazuo Ueda told parliament this week that underlying inflation is very close to the 2% goal, the same report said.
Reuters reported that the BOJ may revise up its inflation forecast next week and signal readiness to keep raising rates from still-low levels. It framed September's hike as a shift toward guarding against underlying inflation overshooting the target, which raises the prospect of additional rate hikes.
What Does a BOJ Rate Hike Mean for US Stocks?
A BOJ hike that strengthens the yen could push traders to unwind yen carry positions, which "triggers selling in U.S. tech stocks, Treasurys, and commodities," according to a December 2025 Barchart analysis syndicated on Yahoo Finance. The same piece warned that "even small moves in the yen can trigger massive leverage unwinds."
On Friday, the yen firmed after the release, according to investingLive, which noted that USD/JPY has held roughly between 157 and 159 for most of October.
This article is for education and information only and is not investment advice. Investment decisions are yours to make after your own research.
Gotrade is the trading name of Gotrade Securities Inc., which is registered with and supervised by the Labuan Financial Services Authority (LFSA). This content is for educational purposes only and does not constitute financial advice. Always do your own research (DYOR) before investing.
M. Alfathan Rahman is a content writer with over 3 years of experience developing digital content strategies across various industries, including fintech. He has experience producing content for tax-related websites and financial education platforms. His focus areas include data research, and crafting financial articles that are informative, accurate, and accessible to investors of all experience levels.
Hendrie Saputra holds a Master of Business Administration (MBA) with a concentration in Business Risk & Finance, along with professional experience in finance, marketing, and project management. He is experienced in analyzing market data and developing research-driven business strategies.
