The purpose of this study is to clarify the architectural characters of the fish warehouse at Honfuna-Cho of Nihonbashi, Tokyo, and to know the Japanese response to the European architectures in the eary Meiji Era. A summary will be given as follows; 1. The fish warehouse at Honfuna-Cho was built early in the Meiji Era (1875) by a group of eight landowners. 2. Early in the Meiji Era the European style house was called "Seiyo-Zukuri", and "Seiyo-Zukuri" was built for a social status symbol of enterprisers. 3. The fishwarehouse at Honfuna-Cho had European truss, but the warehouse was not called "Seiyo-Zukuri. Because the warehouse was typical of Japanese style. 4. The reason why the warehouse was not built in "Seiyo-Zukuri" was found in the fact that the warehouse was built only for practical use.