In fact, the letter was kept by Yoshiharu HORIO, who received it from Hideyoshi, and is currently in the possession of the Osaka Museum of History as important cultural property (the official letter to Hideyoshi TOYOTOMI from the King of Ming, 綾本墨書 明王贈豊太閤冊封文).
実際には国書を下げ渡された堀尾吉晴が保管しており、現在も重要文化財（「綾本墨書明王贈豊太閤冊封文」）として大阪歴史博物館に所蔵されている。