【民法総則】失踪宣告による死亡擬制 https://shakaijin-shihoshiken.com/%e3%80%90%e6%b0%91%e6%b3%95%e7%b7%8f%e5%89%87%e3%80%91%e5%a4%b1%e8%b8%aa%e5%ae%a3%e5%91%8a%e3%81%ab%e3%82%88%e3%82%8b%e6%ad%bb%e4%ba%a1%e6%93%ac%e5%88%b6/