The Japanese yen surged as much as 3.3% against the US dollar on Thursday after Tokyo intervened in the currency market again. The Bank of Japan (BoJ) kept its benchmark rate at 1% on Friday by a majority vote of its nine-member board, hours after data showed inflation quickening in the capital. The move complicates a narrative drawing Japanese-listed companies into Bitcoin (BTC), Ether (ETH) and smaller tokens.
Yen Intervention Puts Japan's Corporate Crypto Bet on Trial
31 July 2026 - 05:31 UTC
By Oihyun Kim
The yen jumped from around 162.80 to as high as 157.98 on Thursday before sliding back to 160.75 in Tokyo on Friday morning, giving back more than half the intervention-driven gains.
Tokyo consumer price index (CPI) excluding fresh food rose 1.9% in July from a year earlier, above economists' expectations of 1.7%, and a gauge excluding fresh food and energy, closely watched by the BoJ, gained 2%. Market participants estimated the intervention at ¥5tn to ¥10tn (about $31bn to $62bn), according to Rinto Maruyama of SMBC Nikko Securities.
Finance Minister Satsuki Katayama declined to confirm the operation, saying she "can't answer." Vice Finance Minister for International Affairs Atsushi Mimura said Japan had received support from the US "that goes beyond simply moral support."
US Treasury Secretary Scott Bessent called the yen "very undervalued" on Fox Business. The New York Federal Reserve, acting on US Treasury instructions, asked multiple banks for dollar-yen quotes on Thursday, per Nikkei. Such rate checks typically signal preparation for intervention, and simultaneous engagement by US and Japanese authorities in the market is rare.
Buyers, sellers split
Japanese-listed companies have been adding crypto to corporate balance sheets in recent months, with proponents citing that yen weakness erodes yen-denominated reserves. The intervention and the BoJ's hold now leave that thesis open to reassessment: this month has split issuers between those still building positions and those starting to unwind them.
Eole, an internet services group on the Tokyo Stock Exchange (TSE) Growth market, disclosed on 28 Jul the purchase of about 1,078 Hyperliquid (HYPE) tokens for roughly ¥10.08mn (about $63,000), reportedly the first HYPE holding by a Japanese-listed company. Eole plans to accumulate up to ¥100mn (about $630,000) by end-August. HYPE is the native token of Hyperliquid, an onchain derivatives exchange.
Quantum Solutions, previously among the largest listed-company ETH holders in Japan, sold 1,000 ETH for about ¥310mn (about $2mn) via a subsidiary and raised its cumulative divestment ceiling to 4,375 ETH. Separately, a former director of nail salon operator Convano stepped down over losses on the company's corporate Bitcoin position.
Onchain yen expands
Alongside the treasury debate, JPYC, a yen-denominated stablecoin issued under Japan's revised Payment Services Act framework, is gaining share on Japanese blockchain networks. Its market capitalization grew from about $20.2mn on 22 Jun to about $32.5mn on 20 Jul, per Token Terminal, an increase of roughly 60% over four weeks. The growth came despite yen weakness that would have reduced the dollar value of JPYC holdings.
The issuer has said it earns from interest on reserve assets, comprising Japanese government bonds and bank deposits, rather than user fees. The 10-year JGB yield stood at around 2.8% at the end of July, up from about 1.5% a year earlier. Holders of the yen-pegged token, unlike those of dollar stablecoins, saw a brief rise in the dollar value of their balances during Thursday's intervention-driven yen surge.
While the treasury trade rests on a weaker yen, JPYC's growth tracks demand for the yen itself onchain.
Fiscal concerns weigh
Japan's Diet gave final approval this month to a revised FIEA reclassifying crypto assets as financial instruments, with the new regime set to take effect in fiscal 2027, and Katayama flagged a review of crypto exchange-traded fund (ETF) approvals on 10 Jul.
Yet macro conditions have pulled in the other direction. The yen's slide back to 160 reflects concerns over Prime Minister Sanae Takaichi's fiscal stance, per Nikkei. Takaichi indicated on Thursday a food consumption tax cut to 1% from 8% for two years from April 2027, and the government removed spending ceilings on growth-sector and crisis-management investments in its fiscal 2027 budget.
Positioning remains tilted toward further yen weakness: non-commercial yen short positions stood at 152,125 contracts as of 21 Jul, near the July 2024 peak of 184,223, according to US Commodity Futures Trading Commission (CFTC) data. A rapid unwind of yen-funded carry trades in mid-2024 had preceded a sharp sell-off in Bitcoin and Ether.
Takeshi Minami of the Norinchukin Research Institute told Bloomberg the intervention's impact would not last, citing fiscal concerns rather than rate differentials as the main driver of yen weakness. Ueda holds a press conference later on Friday.
