On September 18 (Friday), after a two-day monetary policy meeting, the Bank of Japan acted as scripted: it raised the policy interest rate from 1.00% to 1.25%, a standard increase of 25 basis points, bringing the rate to its highest level in about 31 years. This decision aligned perfectly with market expectations and those of surveyed economists, resulting in only a "within expectation" minor adjustment in traditional asset prices, making it appear calm. However, looking at the bigger picture, this is the second rate hike this year after one in June, marking the shortest interval since 1990. Several media outlets even described the current pace of rate increases in Japan as "the fastest in about 36 years"—for an economy that has maintained ultra-low interest rates for decades and has been viewed as a "tap" for low-cost financing globally, this pace itself signifies a structural shift. Rising from 1.00% to 1.25% may seem just a numerical change, but it means that the financing cost based on the yen and the global risk-free interest rate anchor are being rewritten, while high β assets like BTC and ETH, which are highly sensitive to liquidity and rates, are positioned at the downstream of this monetary policy normalization, facing multiple restraints from rising discount rates, yen financing transaction retracement, and tightening cross-market leverage—the core issue has shifted from "Will Japan raise rates?" to "How will this new interest rate center alter global funding risk appetite and force the crypto market to reprice assets such as BTC and ETH?"
End of 31 Years of Low Interest Rates: Rising Yen Rates Change the Pricing Base
When the Bank of Japan raised the policy interest rate from 1.00% to 1.25% on September 18, it was not merely changing a number but rewriting the "risk-free base" for all assets. The level around 1.25% is a high point not seen in about 31 years, and for an economy long accustomed to ultra-low rates or even zero rates, it signifies the pressing of a phase termination key on the era of extreme monetary easing. More critically, the interval between this rate hike and one in June is recorded as the shortest since 1990, with multiple media outlets describing the current rate-hiking cycle as "the fastest in about 36 years" (according to a single source). The signal here is not about how significant this 25 basis point increase itself is, but that the Bank of Japan is accelerating the return of interest rates from abnormally low levels to the "normal range," allowing the yen, a traditionally low-cost financing currency, to start incorporating genuine time value.
As the risk-free yield on the yen rises, it not only reshapes the discount rate for yen-denominated assets but also subtly raises the global interest rate pricing anchors. For high β assets like BTC and ETH, this elevation is directly reflected in two aspects: first, the risk compensation demanded by investors for highly volatile assets increases, leading to an overall downward adjustment of the reasonable valuation range under the same cash flow and growth expectations; second, the carry and leverage structures based on the yen are seeing their "risk-free alternatives" becoming more attractive, increasing the opportunity cost of holding crypto positions. In other words, as yen rates move from the 0.x era to the 1.x era, the global risk-free interest rate curve is pushed up as a whole, and the discount rates on which high β assets rely for pricing begin to systematically rise, rewriting the "low-interest discount story" that the crypto market has been accustomed to over the past few years.
Yen Financing Becomes Expensive: Global Leverage and Crypto Carry Are Squeezed
When the Bank of Japan raised the policy interest rate from 1.00% to 1.25% on September 18, refreshing a 31-year high, it wasn't just the discount rate that was rewritten but also the cost curve of global leverage. For decades, the yen has long served as a "global low-cost financing currency," with extensive cross-asset and cross-market leverage structures treating yen as a cheap raw material; now, the price of this raw material is being systematically elevated. More crucially, the interval between this rate hike and the one in June is recorded as the shortest since 1990, and multiple media outlets have described the current cycle as "the fastest in about 36 years." This has made the market realize that yen financing is no longer a "quasi-zero-cost" variable that can be locked in for long periods but rather a variable that will continue to rise.
In such an environment, crypto carry positions financed in yen or multiple currencies become one of the first groups to feel the pressure. The crypto market heavily relies on perpetual contracts, futures, and lending for leverage, which makes the strategy highly sensitive to funding costs; as policy interest rates rise, both the yen-denominated risk-free yield and financing costs increase, compressing or even inverting the previously established yield spread structure based on "low-interest yen + high β crypto." A faster rate hike cadence signifies a rise in macro volatility risks, causing cross-asset participants to be more inclined to actively reduce positions to prevent forced deleveraging during the next volatility wave. Coupled with the retracement of risk asset prices themselves, BTC, ETH, and similar highly leveraged varieties are more likely to experience a cascading effect in liquidations: first the carry based on yen financing is unwound, followed by the need for additional margins based on dollar-denominated derivatives, ultimately reflecting on-chain as a spike in transaction volume and intensified volatility; this round of rising yen financing costs is shortening the duration for leveraged funds in the crypto market.
East Asian Yields Rise: Funds Rebalance Between US Stocks and Crypto
As the Japanese policy interest rate has been pushed to a 31-year high and the domestic yield curve rises, the main actors in this story are no longer simply traders leveraging in yen, but large institutions holding global portfolios. Historically, during the era of ultra-low interest rates, they viewed the yen as "cheap raw material," massively buying overseas bonds and stocks; now, the same funds, looking back, are seeing a relative increase in the attractiveness of domestic government bonds, credit, and dividend assets. Even marginally reallocating some weight back to domestic markets from US stocks and overseas bonds constitutes a behavior of rebalancing through yield differentials, resulting in a loss of some inherent demand for overseas risk assets that originally relied on East Asia's low-interest rates.
For the crypto market, this rebalance does not manifest as a direct sell-off on-chain but rather as an "upstream shock" starting from US stocks. Japanese institutions historically hold a significant amount of overseas stocks, and once their exposure to growth stocks and tech stocks in the US declines, assets like BTC and ETH, which have historically moved in high correlation with them in past cycles, will passively bear a contraction in risk appetite: capital may not immediately sell off coins, but the budget for new purchases gets squeezed, reducing marginal inflow. Since this rate hike was within expectations, short-term price responses may be more subdued under noise; however, if Japan continues to maintain or even advance the rate hike pace, the systematic rise of East Asian yield centrals will force global portfolios to reassess risk weights. The market will subsequently have to price where the path of Japan's interest rate hikes might stop and how much capital that would have flowed into US stocks and crypto will now choose to stay in East Asia.
Expectations of a Stronger Yen Heat Up: Fine-Tuning of USDT Pricing and Local Trading Pairs
When the Bank of Japan raised the policy interest rate from 1.00% to 1.25% on September 18, pushing the rate to its highest level in about 31 years and aligning its rate path closer to other major developed economies, an immediate change is that nominal returns on yen-denominated assets are finally "calculable." For local Japanese funds, historically, in an ultra-low interest rate environment, to hedge against currency depreciation and zero interest rates, they had to passively increase their exposure to dollar assets and high β risk assets; now they can achieve more considerable risk-free returns on yen assets. If the market further interprets this rate hike as a signal for a more robust yen in the medium to long term, then Japanese investors' reference points for a given BTC position will undergo subtle changes: the same candlestick priced in USDT may remain static in the dollar world, but when converted back to yen, it will be affected by exchange rate expectations, impacting actual profits and losses. This will enhance investors' sensitivity to BTC/JPY price paths, shifting their focus from merely monitoring BTC/USDT or BTC/USD volatility.
Under this expectation shift, the pricing structure of the crypto market is still predominantly driven by dollar-denominated tokens like USDT and USDC, with global liquidity continuing to center around the dollar. However, fiat trading pairs like BTC/JPY on local Japanese exchanges are beginning to bear more pricing pressure from "local currency yield + exchange rate expectations." Compliant yen trading pairs directly connect yen funding to the crypto market, and as yen yields rise and the market anticipates a stronger local currency, a portion of Japanese investors may prefer to establish and liquidate positions using BTC/JPY on local platforms rather than incur additional dollar exposure through BTC/USDT. The outcome may not be a drastic volume shift but rather a subtle rebalancing in transaction structure: the price difference, depth, and spot transaction ratio between BTC/JPY and BTC/USDT may show different states than in the past low-interest periods under changes in interest and exchange rate expectations. What remains to be observed is whether, as the path of Japanese interest rates becomes clearer, the transaction share and price gap of BTC/JPY relative to BTC/USDT will continue to deviate from historical ranges, thereby revealing the extent of yen funds' repricing of crypto risk assets.
If Japan Continues to Raise Rates: Three Key Clues for Crypto Traders to Watch
The Bank of Japan's push of the policy interest rate to a new high of about 31 years, completing two rate hikes in the shortest interval since 1990, effectively announces that this former "zero-interest financing pool" is now joining the global tightening list, further tightening the interest rate environment for crypto assets. Moving forward, what poses a real threat to crypto traders is not this "expected" 25 basis point move but potential future path surprises: the first clue is to continuously track Japan's subsequent rate decisions and official statements; as long as the pace of rate hikes exceeds what the market has originally priced, it could elevate global expectations for risk-free interest rates and compress valuation tolerance for high β assets like BTC and ETH; the second clue involves Japan’s government bond yield curve and yen movements; if yields continue to rise and the yen strengthens temporarily, the allure of yen financing increases relatively, prompting a reassessment of cross-market carry and leverage positions, potentially recapturing a portion of the risk budget that would have flowed into dollar-denominated crypto assets back to domestic Japanese assets; the third clue refers to the variables at the on-chain and derivatives level—overall leverage levels of BTC and ETH, the financing rates for perpetual contracts, and net capital flows from the yen system to dollar-denominated tokens. Should these coincide with the Bank of Japan's unexpectedly hawkish stance, featuring high leverage rates, rising funding costs, and a return of yen-related funds, it suggests that the trigger conditions for a new round of crypto deleveraging and cross-currency capital migration are quietly being met.
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