According to a survey conducted by the Department of Architecture at Chung Yuan Christian University for the Taipei City Government's Department of Cultural Affairs, the Taipei municipal districts of Chungcheng, Chungshan and Ta-an contain over 900 Japanese houses. Each house is planted with an average of 5.2 old trees, thus giving these districts alone a total of close to 5,000.
根據台北市文化局委託中原大學建築系進行的日式宿舍調查，台北市的中正、中山、大安區有九百多棟日式宿舍，平均一棟宿舍裡有 5.2 棵老樹，光這 3 個區域就有近五千棵老樹。