Banks passed on SoftBank's seven-year AI paper, so households are buying 1tn yen of it

Retail money is not cheap money. At the indicative range, 1tn yen of seven-year paper carries a coupon bill of 43bn to 49bn yen a year, or 301bn to 343bn yen over the life of the bonds ^[1][2]. In the deal's own dollar terms that is between about $1.9bn and $2.2bn of interest to secure $6.3bn of funding ^[2], which is what it costs to replace a bank syndicate with a queue of individual savers who each need a reason to sign.

The reason on offer is a rating, and there are two of them. SoftBank expects a single A from Japan Credit Rating Agency, while S&P has the company at BB+, one notch below investment grade, with the outlook moved to stable from negative in July ^[3][4]. Domestic buyers are being sold the first number. The coupon looks like an acknowledgement of the second.

Then there is the cadence of the year: 418bn yen in April, 260bn yen in June, 1tn yen now ^[10]. This issue is roughly one and a half times the two earlier ones combined and takes the year's retail total to about 1.68tn yen ^[3][4]. Sizes rising that fast down one channel are a test of its depth rather than a preference for it. Yuuki Fukumoto of NLI Research Institute attributes the bank reluctance to weak deposit growth, the credit rating and the seven-year duration ^[5], and the same pattern pushed Oracle to find anchor buyers outside the banking system ^[6].

Even at record size the arithmetic does not close. The 1tn yen covers roughly a tenth of the more than $60bn SoftBank has pledged to OpenAI ^[7][6], Bloomberg Intelligence's Sharon Chen puts the remaining shortfall above $20bn and expects offshore issuance in the near term ^[9], and SoftBank has separately sought a $10bn margin loan secured against its OpenAI stake ^[8]. Households are being paid a coupon set against a credit rating. The stake itself is going to a lender who asked for collateral.

Scale explains the queue. Alphabet, Meta, Microsoft and Amazon have committed nearly $2.4tn to AI-related spending, and Alibaba took about $10bn out of Hong Kong on Monday for chips and data centres ^[11][12]. Japan's largest ever retail bond amounts to about a quarter of one percent of the four US commitments ^[5]. Bank balance sheets were never going to absorb that volume in seven-year form at a sub-investment-grade rating.

A European issuer in the same position has no equivalent channel. Prospectuses across the EEA routinely bar sales to retail investors, because the PRIIPs rules require a key information document that most issuers decline to produce ^[13]. The Savings and Investments Union, adopted in March 2025, exists to move part of the 10tn euros European households hold, some 7tn euros of it sitting in bank deposits, into capital markets ^[14][7]. Japan has now demonstrated what mobilised household savings fund when institutional lenders step back, and Masayoshi Son's answer to the bubble question is that the talk is absurd ^[15].