The Bank of Japan has made five rate hikes since March 2024, and only the 31 July 2024 hike came before a heavy Bitcoin loss, 16.47% over five sessions. A BoJ rate hike reaches Bitcoin through the cost of borrowing yen, and on our own closes the other four moved it less than an ordinary week does.
Our scope test takes one event out of the sample and checks what survives. Bitcoin moved an average of 3.16% on the five hike days against 1.74% on 978 other days, but 19 March 2024 carries that gap by itself. Drop it and the other four hike days averaged 1.85%. The next decision lands on Friday 18 September 2026, with the policy rate at 1.0%.
Item | Value |
Next BoJ decision | Friday 18 September 2026, policy rate 1.0% since 16 June |
Hikes since 2024 | Five, from minus 0.1% to 1.0% |
Hike day against other days | 3.16% against 1.74% average move |
The one outlier | 19 March 2024, Bitcoin -8.40% |
August 2024 unwind | -16.47% close to close, 31 July to 5 August |
BoJ holds | 11 of 16 closed lower, a small sample |
How Does a BoJ Rate Hike Reach Bitcoin?
Until March 2024 the Bank of Japan charged minus 0.1% on part of the balances banks kept with it, as its December 2023 policy statement records. Borrowing yen cost next to nothing. Traders borrowed that cheap yen, swapped it into dollars and bought assets that paid more. A BoJ rate hike raises the cost of that position and tends to lift the yen. If you borrowed in yen, you then owe more in dollar terms on the same loan. If enough of them close at once, they sell whatever the yen bought, and Bitcoin trades through every Tokyo morning when stock markets elsewhere are shut.
That mechanism is the yen carry trade, and how the yen carry trade links Tokyo to Bitcoin walks through the funding chain step by step.
Timing makes the Bank of Japan easy to measure. Every decision meeting since January 2024 ended between 11:18 and 12:49 Tokyo time, or 02:18 to 03:49 UTC. Each decision falls inside its own date's UTC daily bar. The same announcement hits Japanese equities first, and our Nikkei 225 guide explains why BoJ meetings rank among that index's biggest volatility events.
Which Bank of Japan Rate Decisions Changed Policy Since 2024?
The board has met 21 times inside our price series, and it raised rates at five of those meetings. The March 2024 move ended negative rates on a 7-2 vote and set the overnight call rate at around 0 to 0.1%. July 2024 took it to 0.25% on another 7-2 vote, January 2025 to 0.5% on 8-1, December 2025 to 0.75% unanimously and 16 June 2026 to 1.0% on 7-1.
The other 16 meetings left the rate where it was. The closest call came on 28 April 2026, when the board voted 6-3 to stay at 0.75% and three members proposed 1.0%. The board delivered that 1.0% seven weeks later. At the 31 July 2026 meeting the vote was 8-1 to stay at 1.0%, with Takata Hajime proposing 1.25%, a proposal the board defeated.
The rate gap with the US drives these votes over years, and how a weak yen pushed Japanese companies into Bitcoinfollows that gap into corporate treasuries.
What Did Bank of Japan Rate Hikes Do to Bitcoin?
Method: I took Phemex BTCUSDT perpetual daily closes from 21 December 2023 to 15 September 2026, 1,000 bars in all. The decision-day move is the close on the decision date against the prior close, and the forward moves run five and 20 sessions from the decision close. The control is every other day in the series with all 21 decision days removed.
Hike date | Rate after | Vote | Decision day | 5 sessions | 20 sessions |
19 Mar 2024 | 0 to 0.1% | 7-2 | -8.40% | +8.54% | +15.71% |
31 Jul 2024 | 0.25% | 7-2 | -2.38% | -16.47% | -8.71% |
24 Jan 2025 | 0.5% | 8-1 | +0.92% | -1.06% | -7.86% |
19 Dec 2025 | 0.75% | Unanimous | +3.10% | -0.54% | +3.36% |
16 Jun 2026 | 1.0% | 7-1 | -0.99% | -3.59% | -2.47% |
On the decision day the five hikes averaged a 3.16% move in either direction, close to double the 1.74% of ordinary days. One day does all of that work. The 8.40% drop on 19 March 2024 was larger than 99% of the 978 control days, and Bitcoin won most of it back inside five sessions. The other four hike days averaged 1.85%, a gap of about a tenth of a percentage point.
The five-session read looks worse at first, with an average of -2.62% after hikes against +0.47% for ordinary stretches. Four of the five hikes closed lower a week on, and August 2024 drives that average. Take it out and three of the remaining four still slipped, but only by 0.54% to 3.59%. Their average absolute move of 3.43% came in under the 4.01% of an ordinary five sessions. By 20 sessions the hikes averaged a 7.62% absolute move against 8.55% for the control, and by then the decision is lost in ordinary noise.
The calendar is the second half of the scope test. Three of the five hikes landed within a day of a US Federal Reserve decision, and the 24 January 2025 hike had one five days later. Decision-week moves are not BoJ-only. The one hike with no Fed decision inside a week, 19 December 2025, saw Bitcoin rise 3.10% on the day. US risk appetite pulls on the same positions, and Bitcoin's correlation with the S&P 500 shows how closely the two have traded.
The August 2024 Yen Carry Trade Unwind
On 31 July 2024 the Bank of Japan's statement lifted the rate to 0.25%. A separate unanimous vote set a plan to cut its monthly government bond purchases to about 3 trillion yen by early 2026. Bitcoin closed that day at 64,608.2 on the Phemex perp. It closed at 61,464.1 on 2 August, 58,136.2 on 4 August and 53,970.2 on 5 August, a 16.47% fall close to close.
The popular version says Bitcoin went from $65,000 to $50,000 in a week, and that's only true to the 5 August intraday low. That low of 48,813.3 sat 24.4% under the 31 July close. The daily close never got near it. By 8 August the perp had closed at 61,679.5, up 14.3% from the 5 August close.
The Fed also announced a decision on 31 July 2024, inside the same UTC daily bar, so the BoJ can't claim that week alone. What the week does show is the case an average hides, a carry-trade unwind meeting two central bank decisions in one daily bar.
Do BoJ Holds Move Bitcoin?
Holds look quieter and slightly bearish, and the sample is too small to trust the tilt. Bitcoin closed lower on 11 of the 16 hold days against 480 of 978 ordinary days, about 49%, and 16 meetings can throw up that split by chance. The average hold-day move was 1.83% against 1.74% for ordinary days, and over five sessions holds averaged 2.47% against 4.01%.
The biggest hold-day move came on 19 March 2025, when Bitcoin gained 4.98%, and the Fed announced a decision that same day.
The 28 April 2026 split vote, the closest a hold came to a hike, moved Bitcoin -1.34% on the day and +2.91% over five sessions. The 31 July 2026 hold saw a 2.92% drop on the day and a 16.10% gain across the next 20 sessions. That gain belongs to August's broad rally more than to the board.
What to Watch at the Bank of Japan Rate Decision on 18 September
The Bank of Japan meeting schedule lists the September 2026 BoJ meeting for 17 and 18 September, with the decision on Friday 18 September. The policy rate has sat at around 1.0% since the 16 June hike took effect on 17 June. Takata's 1.25% proposal in July is the only vote on record for the next step. If a second or third member joins him, that tells you more about October than the decision itself.
This meeting carries no Outlook Report. The schedule puts the next one with the 29 and 30 October meeting, and the Summary of Opinions from September lands on 28 September.
Bitcoin enters the meeting on a weak close. The perp closed the Tuesday 15 September session at 75,601.9, down 3.28%, on a day when 22 of the 116 Phemex perps with a 15 September bar closed higher. Japanese demand works on a slower clock than any single meeting, and Japan's plan to approve spot Bitcoin ETFs and cut taxes covers that longer channel.
Our test gives you a working rule for any BoJ interest rate move and Bitcoin. In four of five cases a hike on its own moved Bitcoin about as much as a normal day. August 2024 is the exception, and that week needed more than a Tokyo announcement to do its damage.
Frequently Asked Questions
When does the Bank of Japan publish its statement?
The statement follows the end of the meeting by about seven minutes. On 31 July 2026 the meeting ended at 12:04 Tokyo time and the Statement on Monetary Policy went out at 12:11. The full Outlook Report text followed on 3 August.
Who voted against the June 2026 hike?
Asada Toichiro cast the one vote against the move to 1.0%, among eight members present. Governor Ueda Kazuo was absent from that meeting, so Deputy Governor Himino Ryozo chaired a second day that ran from 9:00 to 12:12 Tokyo time.
How many policy meetings does the Bank of Japan hold a year?
Eight. The 2026 schedule runs from 22 and 23 January to 17 and 18 December. An Outlook Report comes with four of them, one a quarter, and September's meeting isn't one of the four.
Bottom Line
A Bank of Japan rate decision is a positioning event for Bitcoin before it is a rate event. Since March 2024, five hikes produced one decision-day shock that mostly reversed inside a week. They also produced one five-session loss, and it arrived with the carry-trade unwind and a Fed decision in the same bar. On 18 September the number to read is the vote count, because the size of the yen trade behind the board matters more than a quarter point.
Disclaimer: This article is for informational purposes only and is not financial advice. Cryptocurrency trading involves substantial risk. Always do your own research before making investment decisions.
