Siiibo

Siiibo (now operating as Metaplanet Securities / シーボ証券) is a specialized online securities firm in Japan that creates a direct marketplace between corporate bond issuers and individual investors. The platform focuses on middle-to-late stage unlisted startups and growth companies, offering corporate bonds with interest rates of 2–8% and investment minimums starting around JPY 500,000. Siiibo differentiates from social lending platforms by issuing regulated securities-grade bonds enabling secondary market trading, and provides investors with detailed IR information and ongoing company monitoring during the bond holding period. The firm holds a Type 1 Financial Instruments Business registration under Japan's Financial Instruments and Exchange Act.