He brought hosho (letter) which started with the phrase of '南閻浮州東海路夷千島王遐叉呈上朝鮮殿下' (Nanenbushu Tokairo Esochishimao Kasha Teijo Chosen Denka: To Royal Highness of Korea from Kasha, King of Ezochishima located on the east sea), and told that about 300 years had passed after the trading with Japan had brought Buddhism to Ezochishimakoku (Ezochishima country) where there had not been Buddhism conventionally, Ezochishima sought Daizo-kyo Sutra (the Tripitaka) because there was no such Sutra also in Japan, and Ezochishima could conquer Orangkai located in the remote region of Korea when Orangkai rebelled against the King of Korea because Ezochishimakoku bordered on Orangkai in the west.
「南閻浮州東海路夷千島王遐叉呈上朝鮮殿下」で始まる奉書を持参し、夷千島国が従来仏教を知らなかったのが日本と通交するようになって以降仏教が伝来し三百年余りとなったこと、大蔵経が日本にもないので欲しいこと、夷千島国は西辺で朝鮮辺境の野老浦と接しているので野老浦が朝鮮王に反逆した際は征伐できること等を伝えた。