The statement is strongly supported by multiple, consistent sources, including high-authority financial news outlets. The core components of the claim are each corroborated:1. **The Sale Amount ($5.2 billion):** This specific figure is explicitly mentioned by a high-authority source (Yahoo Finance) and corroborated by several other relevant sources, including a financial commentary service (The Kobeissi Letter on Facebook) and a capital management firm (on LinkedIn), which also provides the yen equivalent (¥770 billion).2. **The Seller (Japanese insurers) and Asset (JGBs with 10+ year maturities):** The primary news source (Bloomberg) identifies the sellers as insurers and the assets as "Super-Long Bonds." The highly specific LinkedIn post further clarifies this as "10-year+ JGBs," directly matching the claim.3. **The Historical Significance (Largest sale since 2004):** The Bloomberg article, which appears to be the original source of the news, explicitly states that insurers sold a "Record Amount of Super-Long Bonds" and references data going back to 2004. This directly confirms the historical context of the sale.While some of the sources have low to medium authority (social media posts), they are perfectly aligned with the information reported by high-authority sources like Bloomberg and Yahoo Finance, serving as strong corroborative evidence. There is no conflicting information among the relevant sources provided. The consistency across primary news reports and secondary financial commentary makes the statement very likely to be true.