This trip corrected mutual misunderstandings between Japan and Korea. In Tsushima, Song received a protest from Soda Saemontaro over a Korean document that stated Tsushima's dependence on Korea. He warned of the Shōni clan's possible military action. Song realized that Sō Sadamori had not been involved in the previous negotiations, and also learned of the Sō clan's vassalage to the Shōni clan. These realizations overturned Korea's plans towards Tsushima. In Kyoto, Song clarified that the Joseon had no intention of invading Japan. On their way back, Korean envoys faced the Sō and Shōni's hard-line attitude toward the Joseon.