NOK/JPY to 17.40: Norges Bank's hold

The Norwegian krone against the yen (NOK/JPY) reaches 17.40 by December 23, 2026 in the base case, 17.70 in the bull case and 16.34 in the bear case. The base case is a Norges Bank hold at a 4.50% policy rate against a Bank of Japan (BOJ) overnight call rate around 1.25%, a 325 basis point gap, with the cross at 17.149 yen per krone on the November 4, 2026 Norges Bank middle rate.

That 17.149 reading is 14.0% above the 15.042 yen per krone on November 4, 2025. Statistics Norway put inflation at 3.4% in the year to September 2026, and the consumer price index adjusted for tax changes and excluding energy products (CPI-ATE) at 3.0%. The December 17 Monetary Policy Report has to leave the policy rate near 4.50% if 17.40 is to stand.

Key Levels:

• NOK/JPY: 17.149 yen per krone on November 4, 2026, Norges Bank series EXR/B.JPY.NOK.SP at 5.8312 kroner per 100 yen.
• Base case target: 17.40 by December 23, 2026, above the May 21, 2026 high of 17.239.
• Bull case target: 17.70 if December 17 lifts the policy rate above 4.50% and the BOJ holds 1.25%.
• Bear case target: 16.34, the October 2, 2026 low, if the December path is marked down.
• Major resistance: 17.239 on May 21, 2026, series at 5.8007 kroner per 100 yen.
• Major support: 16.340 on October 2, 2026, from 6.1198 kroner per 100 yen.
• Invalidation level: a weekly close below 16.70, under the September 24, 2026 print of 16.736.

How the yen-per-krone figure is built

The spot is an official middle rate, inverted, across 252 business observations from November 4, 2025 to November 4, 2026 in Norges Bank series EXR/B.JPY.NOK.SP. The portal quotes the yen in hundreds of kroner and tags the row to the European Central Bank (ECB) concertation. The bank's exchange-rate FAQ calls these quotes middle rates, published at about 16:00 CET as an indication. Dividing 100 by 5.8312 gives 17.149 yen per krone. The ECB reference rates for November 4, 2026, 178.30 yen per euro and 10.3970 kroner per euro, divide to 17.1485 and round to the same 17.149. The latest published row in this window is November 4.

Related:USD/ARS to 1,552.30 if the reference crawl holds

What a year of Norges Bank fixings shows

From the October 2 low of 16.340 the cross has risen 4.9% to 17.149, so 17.40 would clear the May 21 high of 17.239.

Sources: Norges Bank series EXR/B.JPY.NOK.SP; Norges Bank, September 24, 2026; Bank of Japan, October 30, 2026; Statistics Norway, October 9, 2026; Norges Bank foreign-exchange press release, October 30, 2026. Yen per krone is 100 divided by the published rate.

The Norwegian krone against the yen is the number of yen that one krone buys, and the figure used here is an inversion of a Norges Bank middle rate. On November 4, 2026 the bank's data portal showed 5.8312 kroner per 100 yen in series EXR/B.JPY.NOK.SP, a business-day spot tagged to the ECB concertation and scaled in hundreds. Dividing 100 by 5.8312 produces 17.149 yen per krone. The ECB reference rates for that day, 178.30 yen per euro and 10.3970 kroner per euro, divide to 17.1485, which rounds to the same 17.149. On November 4, 2025 the series stood at 6.6481 kroner per 100 yen, equal to 15.042 yen per krone, so the cross is 14.0% higher over the year. Norges Bank describes the quotes as middle rates, the mid-point of interbank buying and selling prices, published as an indication for historical comparison.

"Inflation has been above target for several years. By raising the policy rate, we are helping to reduce inflation. It will likely be necessary to keep the policy rate elevated for a time, and the Committee is prepared to raise the policy rate further if needed to bring inflation down to the 2% target within a reasonable time horizon."

— Ida Wolden Bache, Governor, Norges Bank (Norges Bank)

Why a 4.50% hold still carries against the yen

The September 24 decision raised the policy rate from 4.25% to 4.50%, and the forecast keeps it near that level for a period, with inflation at 2% only in 2029. The BOJ statement of October 30 keeps the overnight call rate at around 1.25% by an eight-to-one vote, after Hajime Takata's proposal of around 1.5% was defeated. See the October 30 Bank of Japan outlook for SGD/JPY. A rise to 1.50% on December 18 would leave 300 basis points if Oslo stays at 4.50%.

A hold means the policy rate stays at 4.50% while the call rate stays near 1.25%, the 325 basis point gap from the September 24 and October 30 decisions. The base case carries that gap to 17.40 by December 23, 2026. One BOJ step and the fiscal sale of kroner are a brake, and the dollar-leg mirror is the September guidance gap in USD/JPY.

Where fiscal kroner sales and a December step in Tokyo bite

Norges Bank's October 30 press release sets daily net purchases of foreign exchange at 176 million kroner for November 2026, a government purchase of foreign currency equal to 300 million kroner a day minus a sale of 124 million to fund dividends and interest. The government table shows kroner sales of 300 million a day from September, after purchases of 650 million a day in January. The cross still rose 4.9% from the October 2 low while that supply was running. The flow can be absorbed until the policy path bends, and the analogue for a bend is Norges Bank's 2020 cut of the policy rate to zero, with 16.34 the map from today's 4.50% starting point. The AUD/JPY case around a split Bank of Japan is the reminder that Takata's 1.5% proposal can reprice a yen cross before the majority moves.

"It's important to anchor underlying inflation around our target. That doesn't mean we will just sit and wait. We will adjust monetary policy as appropriate so that underlying inflation becomes anchored around 2%."

— Kazuo Ueda, Governor, Bank of Japan (Reuters)

What would invalidate the 17.40 base case

The base case to 17.40 breaks if any one of these four signals fires:

• The Norwegian policy rate is set below 4.50% on November 5, 2026 or on December 17, 2026. That removes the hold under the 325 basis point gap.
• The December 17 Monetary Policy Report shows the policy rate at 4.00% or lower at any point through the end of 2027. That brings the September decline forward.
• The BOJ sets the overnight call rate above 1.50% on December 18, 2026. A larger step cuts the gap by more than the base case allows.
• The Norges Bank cross finishes a week below 16.70 yen per krone. That is just under the September 24 print of 16.736 and gives back the rise from 16.340.

What to watch into the December decisions

The horizon ends on December 23, 2026, the Wednesday after both December meetings. Norges Bank's calendar has an interim decision on November 5 at 10:00 and the Monetary Policy Report on December 17 at 10:00. October consumer prices are due around November 10, the Expectations Survey on November 19 and the Regional Network report on December 10. The BOJ schedule sets the next meeting for December 17 and December 18. A policy rate still at 4.50%, a call rate at 1.25% or 1.50%, and a cross above 16.70 keep 17.40 in play.

TL;DR

NOK/JPY stands at 17.149 yen per krone on Norges Bank's November 4, 2026 middle rate of 5.8312 kroner per 100 yen, 14.0% above 15.042 on November 4, 2025. The base case is 17.40 by December 23, 2026, the bull case is 17.70 and the bear case is 16.34. The mechanism is a 4.50% hold against a call rate around 1.25%, a 325 basis point gap, with September inflation at 3.4% per Statistics Norway. A weekly close below 16.70 breaks that path.

Frequently asked questions

Where does the 17.149 NOK/JPY spot come from?

It is Norges Bank's November 4, 2026 middle rate, 5.8312 kroner per 100 yen in series EXR/B.JPY.NOK.SP, divided into 100. The same day's ECB reference rates, 178.30 yen per euro and 10.3970 kroner per euro, divide to 17.1485 and round to 17.149. A year earlier the inversion produced 15.042, a rise of 14.0% on this measure.

What are the base, bull and bear cases for the krone against the yen?

The base case is 17.40 yen per krone by December 23, 2026 if the policy rate stays at 4.50% and the BOJ call rate is 1.25% or at most 1.50%. The bull case is 17.70 if December 17 takes the policy rate above 4.50%. The bear case is 16.34, the October 2, 2026 low, if the path is marked towards 4.00% or the policy rate is cut.

Why can a Norges Bank hold still matter if the Bank of Japan raises rates?

The gap is 325 basis points, 4.50% in Norway against around 1.25% in Japan. One 25 basis point rise in the call rate, the step Takata proposed in October, would leave 300 basis points if Oslo holds. The September forecast keeps the policy rate close to the current level for a period and reaches 2% inflation only in 2029.

Which release would show that the 17.40 view has failed?

The price test is a weekly close below 16.70 yen per krone, just under the 16.736 print on September 24. The policy test is a rate below 4.50% on November 5 or December 17, or a path showing 4.00% or lower through the end of 2027. A BOJ call rate above 1.50% on December 18 gives up more than one 25 basis point step.

This article is informational analysis only and is not financial, investment, or trading advice. Foreign-exchange, commodity, and equity markets are highly volatile and can lose substantial value rapidly. Leveraged products carry total-loss risk and may exceed the initial margin posted. Past performance and historical correlations do not guarantee future results. Do your own research and consult a regulated financial adviser before making any investment decision.