Metaplanet has launched BitBonds, a new bond program that gives the Bitcoin treasury company another way to raise money. The company completed the first issuance in late July, selling about ¥200 million (roughly $1.25 million) across four series through a small-number private placement.
Unlike Metaplanet’s stock, which moves with the price of Bitcoin, these bonds pay a fixed interest rate regardless of how Bitcoin performs. The bonds carry annual interest of 4% to 4.3% and mature in roughly three years. They are unsecured, unguaranteed and unrated, meaning there’s no collateral or credit rating backing them beyond Metaplanet’s own promise to pay.
The company said future BitBonds will be issued separately, with terms determined when each offering begins. Metaplanet also plans to develop the framework needed to potentially conduct public bond offerings as the program grows.
*Notice Regarding the Establishment of a New Bond Issuance Program, “BitBonds”, and the Completion of the Inaugural Issuance* pic.twitter.com/a6ZYh7b4LW
— Metaplanet Inc. (@Metaplanet) August 13, 2026
The scale of the raise puts it in context. At roughly $1.25 million, the first BitBonds sale is a fraction of Metaplanet’s $2.75 billion Bitcoin treasury, built from about 43,000 BTC, and far smaller than the ¥8 billion, about $50 million, the company raised in a single zero-coupon bond sale in April specifically to fund Bitcoin purchases. That gap suggests this issuance functions less as meaningful financing and more as a proof-of-concept for the credit market Metaplanet is trying to build.
Why 4% debt is a harder sell in Japan’s rising-yield market
BitBonds are arriving at a very different point in Japan’s fixed-income market than the one that existed for most of the past decade. The 30-year Japanese government bond yield has approached 4%, while the 10-year yield was around 2.8% in July.
That matters because investors now have a safer option that pays almost as well: government bonds. If Metaplanet wants people to buy its debt instead of a safer government bond, it has to pay a rate that makes the extra risk worth taking. For a Bitcoin treasury company, that comparison is particularly important because its underlying asset is far more volatile than the assets normally sitting behind corporate bonds.
The result is that Metaplanet’s borrowing cost cannot be judged simply against historical Japanese rates. It has to be judged against what investors can earn elsewhere in yen. If Japanese government yields continue rising, the hurdle for future BitBonds could rise with them. A 50-basis-point increase in funding costs on ¥10 billion of debt would add ¥50 million in annual interest expense, before considering any refinancing costs.
That pricing sensitivity is worth weighing against how BitBonds were actually priced. Analyst commentary ahead of the launch had floated a target range of 4% to 6%; the first issuance came in at 4% to 4.3%, the low end of that range, suggesting Metaplanet chose a conservative opening rate rather than testing investor appetite higher.
Strategy shows how Bitcoin debt can become its own risk
There is already a useful comparison in the US. Strategy, the world’s largest corporate Bitcoin holder, had $6.7 billion of convertible notes outstanding in May 2026 even after agreeing to repurchase $1.5 billion of debt for about $1.38 billion.
The lesson is not that Metaplanet will follow the same path. Bitcoin treasury companies can accumulate debt surprisingly quickly once investors accept the idea that a growing Bitcoin balance sheet can support repeated capital raising.
That creates a risk that a simple Bitcoin holdings count won’t show you. Debt can amplify the upside of a rising Bitcoin price, but it also reduces management’s room to maneuver when the asset falls. A company with no debt can wait through a Bitcoin drawdown. A company with scheduled interest and principal payments has to manage the same drawdown while meeting obligations to creditors.
So the real question isn’t just how much Bitcoin a company holds. It’s how much debt that company owes against it, and whether it can keep paying that debt if Bitcoin’s price falls. Strategy’s decision to retire $1.5 billion of convertible debt while continuing to hold hundreds of thousands of Bitcoins shows that debt management can eventually become as important as Bitcoin accumulation itself.
BitBonds are ultimately a test of whether Metaplanet can borrow against its Bitcoin again and again, the way a homeowner might borrow against a house. If investors keep buying the bonds at reasonable rates, Metaplanet can keep raising money this way. But if investors start demanding higher rates to compensate for the risk, Metaplanet will have to choose between paying more for debt, selling more stock, or slowing down its Bitcoin purchases.
Additionally, Metaplanet Inc launched a joint study with Metaplanet Securities, JPYC, and Progmat to examine how Bitcoin, stablecoins, and security tokens can be used to build digital credit products in Japan.
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