{"id":67445,"date":"2026-08-01T20:11:13","date_gmt":"2026-08-01T20:11:13","guid":{"rendered":"https:\/\/www.europesays.com\/japan\/67445\/"},"modified":"2026-08-01T20:11:13","modified_gmt":"2026-08-01T20:11:13","slug":"a-major-japanese-bitcoin-mining-pool-just-pulled-the-plug-on-its-bitcoin-service-just-as-3-mega-miners-claimed-60-of-the-network","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/japan\/67445\/","title":{"rendered":"A major Japanese Bitcoin mining pool just pulled the plug on its Bitcoin service just as 3 mega-miners claimed 60% of the network"},"content":{"rendered":"

By the time SBI Crypto pulled the plug on its Bitcoin pool in Japan on July 31, its seven-day average hashrate had fallen 64% in a month. Later that day, a Hashrate Index<\/a> reading put Foundry USA, AntPool and F2Pool at 60% of recent blocks. The timing makes them look connected. Weekly data tell a messier story.<\/p>\n

\"A Related ReadingA rare Bitcoin reorg just showed why six confirmations may not guarantee a final payment<\/p>\n

A rare two-block reorg and the rise of a dominant mining pool are reviving the question of how \u201cirreversible\u201d is a Bitcoin payment.<\/p>\n

Mar 25, 2026 \u00b7 Gino Matos<\/p>\n

<\/a><\/p>\n

SBI Crypto’s official update<\/a> set the first cutoff at 22:00 UTC on July 30, or 07:00 JST on July 31. Share acceptance stopped, and miners began a graceful disconnect. The company scheduled a full Stratum shutdown by 23:59:59 UTC. Its website would stay open for historical data and payout status. The final payout schedule remained unspecified, as did the end dates for API and portal access.<\/p>\n

At about 11:22 UTC on July 31, Foundry held 26.67% of attributed blocks, AntPool 17.13% and F2Pool 16.21%. SBI Crypto was down to 0.72%, or an estimated 6.8 exahashes per second. The dashboard moved again within minutes. The 60.01% reading captures a moment, rather than a lasting level of control.<\/p>\n

\"84% Related Reading84% of BTC hashrate secured Bitcoin DeFi in Q1, but miners saw little fee upside<\/p>\n

Rootstock\u2019s Q1 report shows a large share of Bitcoin hashrate securing smart-contract infrastructure, but fees and usage still decide whether that security becomes economically meaningful.<\/p>\n

May 21, 2026 \u00b7 Liam ‘Akiba’ Wright<\/p>\n

<\/a><\/p>\n

SBI Crypto’s daily telemetry<\/a> charted a month-long retreat. Its seven-day average BTC hashrate dropped from 16.222 EH\/s for the period ending June 30 to 5.817 EH\/s for the period ending July 30. By 11:17 UTC on July 31, separate operational statistics<\/a> put the 24-hour average at about 0.452 EH\/s. SBI’s official block list showed July 29 as its latest block.<\/p>\n

\"Infographic<\/a><\/p>\n

The top three were already above 60%<\/p>\n

Matched weekly buckets from mempool.space<\/a> put Foundry, AntPool and F2Pool at a combined 64.8039% for July 20, then 60.7843% in the still-incomplete July 27 bucket. SBI Crypto’s share fell from 0.9804% to 0.6192%. The top tier had cleared 60% before the cutoff. The July 27 bucket spans the shutdown and remains incomplete, leaving any immediate concentration effect unmeasured.<\/p>\n

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Individual pool movements pulled in different directions. Foundry, AntPool and F2Pool each showed lower estimated hashrate in the partial July 27 bucket than in the prior week.<\/p>\n

Luxor rose, Braiins fell, and NeoPool was absent. Pool-share records reflect work credited to a service.<\/p>\n

Thus, the routes behind SBI Crypto’s lost pool hashrate stay hidden in these aggregate totals.<\/p>\n

\"Foundry Related ReadingFoundry mined over a third of all Bitcoin blocks in the past week<\/p>\n

In a market dominated by a few, Foundry and AntPool together claim control over half the Bitcoin blocks.<\/p>\n

Jan 28, 2025 \u00b7 Andjela Radmilac<\/p>\n

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