The $289 million transaction consolidates a fragmented Japanese market ahead of a reclassification that would push digital assets under the Financial Instruments and Exchange Act as early as fiscal 2027.
SBI Holdings will pay ¥46.7 billion — around $289 million — to take full ownership of Bitbank, one of Japan's oldest and most heavily traded cryptocurrency exchanges. The announcement, filed on Monday, doubles SBI's assets under custody to roughly ¥1.1 trillion and adds close to one million retail accounts. Assuming clearance from the Japan Fair Trade Commission, the deal is expected to close around October.
The structure runs in two stages. A wholly owned SBI subsidiary will first buy shares directly from Bitbank founder and chief executive Noriyuki Hirosue — who holds 30.86 per cent — and from the other individual shareholders around August. Bitbank will then subscribe SBI to a fresh share issuance in October, using the proceeds to buy back and retire the stakes held by MIXI and Ceres, its two corporate shareholders. MIXI holds 26.22 per cent; Ceres holds 22.39 per cent. Once complete, SBI owns 100 per cent.
SBI has been on this path for a while. Its VC Trade unit — the arm that grew out of the group's 2018 VCTrade exchange launch — absorbed Bitpoint Japan in April, and the group already runs one of the country's larger custody and tokenisation businesses through its partnership with Ripple, which SBI has backed since 2016. Bitbank adds the missing piece: a spot-trading brand with a real user base. Bitbank told existing customers on Monday that services will run unchanged during the transition.
The consolidation is not an accident of market timing. Japan's Financial Services Agency is looking hard at whether to move digital assets from the Payment Services Act into the Financial Instruments and Exchange Act — the framework that governs securities. A reclassification, which could take effect as early as fiscal 2027, would raise compliance requirements sharply. Capital adequacy rules, insider-trading rules, disclosure regimes and audit obligations all scale up. The result is straightforward: small independent exchanges struggle to keep the lights on, and large financial groups with existing compliance infrastructure buy them cheaply.
That is exactly what has been happening. The Bitpoint deal in April cost SBI a fraction of Bitbank's price. Coincheck was acquired by Monex in 2018 and now sits inside a listed US shell as CNCK; BitFlyer sold a controlling stake to a private equity consortium last year. Of the roughly 25 licensed spot exchanges in Japan, more than half are now owned by traditional financial firms. Bitbank was one of the last independents at scale, and Hirosue — who built it from a 2014 launch — has taken the cheque.
Bitbank does not print money. A slide in Monday's filing showed the exchange had not been profitable in every recent year, and Japan's spot volumes have been thin for eighteen months as retail traders migrated to derivatives on offshore venues. Yet SBI paid nearly $290 million anyway. Elias Simos of Architect Partners wrote that the number is a bet on future custody flows rather than current earnings — a wager that the Financial Instruments and Exchange Act shift will drive institutional capital to compliant Japanese venues, and that the venue with the biggest existing account base wins by default.
The strategic logic is clear enough. SBI is not buying Bitbank because Bitbank is a good business today. It is buying Bitbank because the option value of being Japan's largest licensed exchange in 2027 is worth several multiples of the current sticker price, and because the alternative — a new entrant, or a foreign exchange licensed under the tightened regime — is the outcome SBI most wants to prevent.
For Hirosue, the exit closes a long chapter. Bitbank launched in the wake of the Mt. Gox implosion and grew during a stretch when Japan was the world's most active bitcoin market by turnover. The exchange survived the 2018 downturn, the FTX collapse, and multiple regulatory rewrites. It did not survive the shift in the market's centre of gravity from independent operators to the financial conglomerates that used to laugh at them.
