This paper proposes a methodology for estimating the number of vacant houses by construction age. This method utilizes microdata from the Housing and Land Survey, a national statistic, to estimate the number of vacant houses, including detached homes, which had not been available due to a lack of data. The estimated data provides an understanding of the actual volume of vacant dwellings in Japan. These results presented the importance of considering measures for old house reuses and demolition based on the volume segment by construction ages.
