Japan Just Hit Its Highest Interest Rate in Over 30 Years. Here’s Why

TLDR

• The Bank of Japan hiked its overnight call rate by 25 basis points to 1.25%, the highest since 1995
• Seven of nine board members voted in favor; two Takaichi appointees dissented
• The BOJ cited AI-driven demand and Middle East conflict as key inflation risks
• Core CPI is expected to exceed 2% in the second half of fiscal 2026
• The yen weakened after the decision while the Nikkei 225 surged 2.1%

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The Bank of Japan raised its benchmark interest rate to 1.25% on Friday, marking the highest level in over 30 years and its second hike of 2026.

BREAKING: The Bank of Japan raises interest rates by 25 basis points to the highest level since 1995 due to elevated inflation.

After the rate hike in June, this marked the shortest interval between rate increases in Japan since 1990.

The global rate hike cycle has arrived.

— The Kobeissi Letter (@KobeissiLetter) September 18, 2026

The central bank increased its overnight call rate by 25 basis points. The move was widely expected by markets and follows a global trend of rate hikes by the European Central Bank and the Federal Reserve.

Seven of the BOJ’s nine board members voted for the hike. The two dissenters, Ayano Sato and Toichiro Asada, both appointed by Prime Minister Sanae Takaichi, called for rates to remain on hold due to uncertainty in Japan’s economic outlook.

The BOJ said the Japanese economy is growing moderately and is expected to keep doing so. But it flagged rising risks from the Middle East conflict and growing demand for artificial intelligence.

The central bank warned that producer price inflation has begun to feed into consumer prices. That has pushed underlying inflation close to the BOJ’s 2% annual target.

AI Demand and Oil Prices Driving Inflation Concerns

The BOJ specifically highlighted AI-related demand as a source of upward pressure on prices. Rising semiconductor and electronics costs tied to AI were listed as a key inflation driver.

High oil prices linked to the Iran war are also expected to push core CPI above 2% in the second half of fiscal 2026. A weaker yen has added to those pressures by making imports more expensive.

The yen had fallen to 40-year lows earlier in 2026 before joint intervention by Japan and the United States helped reverse some of those losses. Despite Friday’s hike, the yen weakened again, with the dollar rising around 1.1% to 157.72 yen.

Analysts at Capital Economics said they expect the BOJ to tighten policy faster than most predict in the coming months.

Markets React to the Decision

Japanese stocks climbed after the announcement. The Nikkei 225 surged 2.1% following the rate decision.

Nikkei futures also extended gains. The market reaction suggests investors viewed the hike as a sign of economic stability rather than a threat to growth.

The BOJ said Japanese financial conditions remain accommodative and will stay that way in the near term. It did not give a clear timeline for future rate hikes.

Governor Kazuo Ueda was scheduled to address markets shortly after the decision for more guidance on the rate outlook.

The BOJ’s statement gave more weight to AI-driven inflation risks than previous communications, according to Capital Economics. The analysts noted this suggests the bank’s hawkish lean may persist even if energy prices fall.

Friday’s hike brings Japan further in line with other major central banks that have moved to tighten policy in response to sticky inflation.