BOJ Hikes to 1.25%, Yen Slides to 157 as Nikkei Gains 1.5%

1.25% is the Bank of Japan's new policy rate after a 25-basis-point increase on Sept. 18, 2026, approved by a 7-2 vote, according to the BOJ's own statement on monetary policy. The yen then weakened rather than strengthened, falling roughly 0.7% to 157.085 per dollar, while the Nikkei 225 closed 966 points higher at 65,102, a gain of 1.51%.

What the Bank of Japan decided, and how it voted

The decision is documented in the BOJ's September statement, which sets the guideline for money market operations to encourage the uncollateralized overnight call rate to stay at around 1.25%, effective Sept. 24, 2026. The same document names the two dissenters: Asada Toichiro, who argued that with the rate of increase in the consumer price index excluding fresh food running below 2% recently it could not necessarily be said the economic situation was strong, and Sato Ayano, who considered that economic and price developments had not substantially accelerated and that raising the rate at this time was not appropriate.

CNBC reported the move takes the policy rate to its highest level since 1995 and came just three months after the previous increase. CNBC also quoted Hirofumi Suzuki, chief FX strategist at Sumitomo Mitsui Banking Corporation, saying the two dissenting votes for no change came as a surprise, and pointed to the split decision and the absence of updated economic forecasts as the reasons analysts gave for the unusual market reaction. That is an attributed explanation of a same-day price move, not proof of cause.

The verified numbers from Friday's session

"Bond yields fell" only describes part of the curve

The summary that circulated with this story - yields down across Japanese government bonds - does not match the session detail. Reuters, in the version carried by The Korea Times, reported that the policy-sensitive two-year yield dropped to 1.835% and the five-year fell 3 basis points to 2.265%, while the 20-year rose 1.5 basis points to 3.85% and the 30-year rose 3 basis points to 4.105%. The 10-year sat between the two, pared its earlier decline and ended down just half a basis point at 2.985%; Trading Economics separately put the 10-year at 2.99% on Sept. 18, a 0.01 percentage point fall from the prior session.

Read together, those are two different messages. Short maturities, which track expectations for the policy rate over the next couple of years, rallied - consistent with traders trimming bets on how fast the BOJ will keep going. Long maturities, which carry more inflation and fiscal risk, did the opposite. A yield is the return an investor earns holding a bond to maturity, and it is specific to that maturity: the 2.985% 10-year figure is not a deposit rate, a short-term rate or a yield a reader can earn on cash.

There is also a reconcilable discrepancy in the equity number. CNBC and Trading Economics both describe a gain of about 1.5%, with Trading Economics recording a 65,102 close, up 1.51%. Reuters reported the Nikkei up 1.7% at 65,221.53 and noted the index had been up 0.8% at the midday break. The higher figure is an intraday reading during a volatile session; 65,102 is the closing level. Reuters attributed leadership to chip-equipment names, citing Lasertec up 9% and Advantest up 7.3%, and Trading Economics listed Lasertec (+8.98%) and Advantest (+7.04%) among the top gainers at the close.

What the figures support and what they leave open

The verified sequence is narrow: a fully expected hike, a wider-than-expected split, a weaker yen, lower short-dated yields, higher super-long yields and a higher equity close. Investing.com described the decision as a dovish hike and reported the yen at around 157.145, its weakest since Sept. 3, putting it on course for a weekly fall of more than 2%; it also noted the dollar was holding near a seven-week high on a hawkish shift from the Federal Reserve. That matters for interpretation: a currency pair reflects both sides, so part of Friday's move is a dollar story rather than a pure BOJ story, and the available sources do not split the two.

On guidance, ING wrote that USD/JPY gained momentum during Governor Kazuo Ueda's press conference, and singled out his comment that the BOJ would need to check the impact of each rate change before moving again - noting that after January's hike the bank waited 11 months. That is an analyst reading of remarks, not a BOJ commitment. The BOJ statement itself says only that, with underlying CPI inflation approaching 2% and financial conditions accommodative, the bank will continue to raise the policy rate and adjust the degree of monetary accommodation. No date or terminal level is attached.

Several things remain unknown from the published evidence. The sources do not quantify how much of the yen's slide came from repositioning after a widely telegraphed event versus a genuine change in the expected policy path, and Investing.com's report of roughly a 53% market-implied probability of another quarter-point hike before year-end is a dated, model-based estimate, not a decision. Nor do the closing prices identify who was buying: a 1.51% index gain and a list of leading semiconductor stocks do not establish whether foreign or domestic investors drove it, or whether the exporter-friendly weaker yen or AI-related demand did more of the work.

The dated item to watch next

One schedule is confirmed in the primary document: the new 1.25% guideline for money market operations, along with the new complementary deposit facility rate and basic loan rate, takes effect on Sept. 24, 2026, per the BOJ's statement and the accompanying amendment to the facility's terms. Ueda flagged fiscal 2027 wage negotiations as a major input into the price trend, but no date for those talks or for the next policy decision was verified in the sources used here.