As Japan opened the door to the rest of the world in the Meiji Era, the wave of westernization spread rapidly over many sectors of Japanese society. One of the most remarkable impacts it made was on the style of dwelling and here we find that the grassroots-level Christian missionary work in many parts of Japan played an important role. This report is a case study that focuses its attention on the missionary activities of Gurney and Elizabeth Binford. This missionary couple engaged in their preaching activities primarily in Ibaraki Prefecture during the period of 37 years, from the time of their arrival in 1899 until 1936 when they left Japan. They opened up their home to the public to show what the Western style of living was like. They taught the local people not only the Western cooking and housekeeping but also the family management based on love and respect as well as pure life. Their activities attracted the attention of younger people, especially those young women who admired Western culture and were sensitive to new ways of thinking, prompting them to long for improvement in their dwelling life. It should be noted that the Western style of dwelling spread in the Japanese society, keeping pace with the modernization and democratization led by Christian spirits. In later years, the trend was carried on by the efforts of the female members of Omi Mission; it was in Omihachiman in Western Japan where dwelling life saw remarkable improvement.