He negotiated with Kim Hon-jip (in 1842) regarding the establishment of the legation and the opening of the port in the Incheon Metropolitan City, and subsequently he succeeded to make the Korean government to admit the official establishment of the Japanese legation in Hanseong and the opening of the Incheon Port.
この公使館開設の件と仁川広域市開港問題について金弘集(1842年)と折衝し、その後、漢城に日本公使館正式設置と仁川開港を朝鮮政府に認めさせた。