Metaplanet to buy Siiibo, use 40,177 BTC for regulated products

Metaplanet has agreed to acquire 100% of Siiibo Securities for ¥2.1 billion. The share transfer is scheduled for July 13, with a planned conversion to a wholly owned subsidiary in August and a rename to Metaplanet Securities.

The company intends to use Siiibo’s regulated securities platform to distribute products tied to its corporate Bitcoin holdings. Metaplanet reported holding 40,177 BTC as of May 31 and describes Project Nova as an initiative to build a Bitcoin-focused financial ecosystem in Japan.

Planned product types cited by the company include Bitcoin-linked bonds, digital credit, tokenized securities, investment funds and yield-style offerings aimed at retail and institutional investors in Japan.

Siiibo is a Tokyo-based online securities firm that offers yen-denominated corporate bond products with stated maturities and historical yield ranges. The firm is listed on the Financial Services Agency’s register of financial instruments business operators, providing an established regulatory channel for securities distribution.

Bitcoin is a bearer asset and does not pay interest. Any yield attached to Bitcoin exposure must be produced by a financial structure. Possible mechanisms noted by market participants include selling option premium, secured lending of BTC, tokenized claims and credit or collateral arrangements. Each mechanism carries specific risks such as issuer credit exposure, Bitcoin price volatility, collateral recall or margin terms, and limits on upside participation or liquidity.

Japanese authorities have discussed applying securities rules to some crypto assets and are considering crypto taxation frameworks. Products distributed through a regulated platform will require regulatory approval, specific disclosures and investor suitability checks under Japan’s rules.

Bank of Japan data show households held about ¥2,351 trillion in financial assets at the end of December 2025, with roughly ¥1,140 trillion in currency and deposits. That scale is cited as context for why a regulated distribution channel may be used to reach domestic investors.

Key near-term milestones are the July 13 share transfer, the expected subsidiary conversion in August and the planned renaming. Subsequent product filings, investor disclosures, collateral arrangements and tax guidance will provide details on the legal terms, risk allocations and investor protections for any Bitcoin-linked offerings.