BOJ Warns of Rising Inflation Risks as Oil Prices Surge and Yen Weakens

Japan’s underlying inflation could face stronger upward pressure than in previous cycles, as higher oil prices and a weaker yen increasingly feed into domestic pricing behavior, the Bank of Japan said in a staff analysis released on Monday.

The findings highlight a potential shift in Japan’s inflation dynamics, with companies now more willing to raise prices and wages—amplifying the impact of external cost shocks on the broader economy.

Oil Prices and Yen Weakness Add to Inflation Pressure

The central bank noted that recent increases in crude oil prices, while posing risks to economic growth, could also lift inflation expectations among households and businesses. This, in turn, may contribute to a more sustained rise in underlying inflation—defined as price growth driven by domestic demand rather than temporary cost-push factors.

The BOJ warned that this transmission channel may now be stronger than in the past, as firms have become more proactive in adjusting prices in response to rising costs.

At the same time, the depreciation of the yen is adding to inflationary pressures by increasing the cost of imports. The central bank cautioned that changes in corporate pricing behavior could make inflation more sensitive to currency movements than previously observed.

Shift in Corporate Behavior Reshapes Inflation Outlook

A key takeaway from the BOJ’s analysis is the evolving approach of Japanese firms toward pricing. After years of subdued inflation and limited pricing power, companies are now more willing to pass on higher input costs to consumers and implement wage increases.

This structural shift suggests that external shocks—such as higher energy prices or currency weakness—may have a more pronounced and lasting effect on inflation going forward.

Policy Implications and Rate Outlook

The BOJ ended its decade-long ultra-loose monetary policy in 2024 and has since raised short-term interest rates, signaling confidence that Japan is nearing a sustained achievement of its 2% inflation target.

The central bank reiterated that it stands ready to continue raising rates if it becomes more confident that underlying inflation will remain stable at that level.

Refining the Measurement of Underlying Inflation

In response to criticism that its concept of underlying inflation lacks clarity, the BOJ outlined its methodology in greater detail. The central bank assesses a range of indicators, including the output gap and various price indices, such as a recently introduced measure that excludes one-off factors like government subsidies.

It also incorporates economic models and survey-based data to evaluate inflation expectations. According to the paper, these expectations currently range between 1.5% and 2.0%, suggesting that inflation is approaching the BOJ’s target but has yet to firmly anchor above it.

Outlook

The BOJ’s latest analysis underscores a more complex inflation environment, where global factors such as energy prices and exchange rates interact with shifting domestic dynamics. As Japanese firms become more responsive to cost pressures, policymakers may face increasing challenges in balancing inflation control with economic stability.