On Friday (September 11) during the Asian session, the USD/JPY pair fluctuated narrowly, currently trading around 154.30, almost unchanged for the day. Since September, the exchange rate has fallen from around 160 to as low as 152.89, with the yen appreciating by approximately 4% against the dollar. The yen's recent strength is closely related to market expectations of a Bank of Japan interest rate hike. A rate hike by the Bank of Japan next week (September 17-18) is widely expected, most likely by 25 basis points to 1.25%, which would bring the rate to a 31-year high.

An interest rate hike is a foregone conclusion; the details are the key.

According to four sources familiar with the matter, the Bank of Japan (BOJ) will raise its policy rate by 25 basis points to 1.25% next week, an expectation already fully priced into by the market. The truly substantive details of this report lie not in the rate hike itself, but in what signals the BOJ is prepared, and not prepared, to send after the hike. Sources say the BOJ has no predetermined view on the final landing point of the interest rate; the pace of future rate hikes will depend on how previous rate hikes have been transmitted to the economy and the extent to which businesses pass on increased input costs to households. This uncertainty is exacerbated by divisions within the committee: some members described as hawkish believe that underlying inflation has reached the 2% target, while others, including member Asada who voted against the June rate hike, are more cautious. Kazuo Ueda is expected to avoid locking in a specific timetable for subsequent rate hikes at the post-meeting press conference, but he may reiterate his July statement that the BOJ may accelerate tightening if it judges financial conditions to be too loose. For the market, this means that even if the rate hike is confirmed, the initial reaction of the yen may be limited.

A 50 basis point rate hike is unlikely.

Some market participants had speculated that the Bank of Japan might unexpectedly raise interest rates by 50 basis points, but sources said this was unlikely, as there were no signs of a sudden jump in wages or price growth to support a larger move. This view was echoed publicly by Bank of Japan board member Yokohama Suga on Thursday, who stated that underlying inflation was close to 2% but showed no signs of significantly exceeding that level—a comment interpreted as ruling out a large rate hike next week. Sources said a more likely path would be a standard 25 basis point rate hike, followed by a period of data observation before deciding on any near-term follow-up actions.

Inflationary pressures continue to support tightening, but the appreciation of the yen and oil prices are creating a tug-of-war.

Regardless of the chosen pace, the broader inflationary backdrop continues to support tightening. Annual wholesale inflation reached 7.6% in August, and the Bank of Japan expects this to pass into consumer prices in the coming months. The central bank's July forecast projects core consumer inflation at 2.5% for the fiscal year ending March 2027. A counter-cyclical force comes from the yen: since the joint US-Japan intervention at the end of July, the yen has appreciated by more than 6%, which typically eases import inflation pressures, but this effect is being offset by Brent crude oil breaking through $100/barrel again. For yen positions, the tug-of-war between the cumulative appreciation over the past few months and high oil prices may be a more noteworthy medium-term dynamic than next week's rate hike itself.

Market expectation: Terminal interest rate 1.75% or higher

Analysts surveyed by institutions expect interest rates to reach 1.5% by the end of March 2027 and 1.75% in the second quarter of 2027, with most respondents believing the final interest rate will be 1.75% or higher. The September, October, December, and January meetings have not yet been held. For the market, the practical conclusion is that a rate hike next week is essentially locked in, but there are almost no clear signals as to whether this marks the beginning of a sustained tightening cycle or a prolonged pause after a single rate hike.

Summarize

It's almost a certainty that the Bank of Japan will raise interest rates by 25 basis points to 1.25% next week, and the market has already fully priced it in. The real focus lies in the Bank of Japan's signals regarding the final interest rate and the pace of rate hikes—and according to sources, the central bank has no predetermined view on the final interest rate, with significant hawkish and dovish divisions within the committee, and Kazuo Ueda is likely to maintain deliberate ambiguity after the meeting. A large rate hike of 50 basis points is considered unlikely, as there are no signs of a sudden jump in wage or price data. The inflationary backdrop continues to support tightening, but the appreciation of the yen and high oil prices are creating a tug-of-war. Market expectations for the final interest rate are concentrated at 1.75% or higher, but in the short term, the market faces a situation where the rate hike is locked in, but the subsequent path is highly uncertain. (USD/JPY daily chart, source: FX678) At 12:21 Beijing time, USD/JPY was trading at 154.30/31.