SBI Crypto, the mining subsidiary of Japanese financial group SBI Holdings, said it would shut its Bitcoin mining pool at 07:00JST on 31 Jul (22:00UTC on 30 Jul) in a customer notice signed by CEO Hiroaki Morita on 2 Jul.
SBI Crypto To Close Bitcoin Mining Pool, Repositioning 2.2% of Hashrate
3 July 2026 - 07:15 CEST
By Oihyun Kim
The shutdown removes a pool holding roughly 2.2% of the Bitcoin network's hashrate as of 30 Jun, per Luxor's Hashrate Index, a mining analytics tracker.
The notice gives no reason for the shutdown but says the pool will run as normal until then. It points miners to Braiins, Luxor Pool and NeoPool as reference alternatives, without endorsement.
Loss already flagged
SBI Holdings' interim report for the six months ended 30 Sep 2025 states that SBI Crypto, which runs the group's overseas mining business, booked a loss of about JPY 2.5bn ($16.7mn) from an unauthorized outflow of proprietary crypto holdings.
That loss resulted in a pretax loss for the crypto asset segment, versus a JPY 1.4bn profit in the same period a year earlier. On its 31 Oct 2025 earnings call, SBI Holdings told analysts the mining subsidiary was already being wound down, adding "we were going to liquidate the business anyway."
Separately, blockchain investigator ZachXBT said addresses linked to SBI Crypto saw roughly $21mn in suspicious outflows on 24 Sep 2025, funnelled through Tornado Cash, with patterns he said resembled North Korea-linked attacks. The $21mn figure does not exactly align with SBI's $16.7mn disclosure, though the timing and asset mix overlap.
Planned since October
The notice includes pre-arranged referrals, named contacts and a multi-week transition period, consistent with SBI's October 2025 statement that the mining business was already being wound down.
SBI Crypto opened the pool in 2021 with 1.1 EH/s (exahash per second) of its own mining power, per SBI's March 2021 announcement.
