Abstract
This study analyzed the carbon mass balance related to architeetural wood based on material flow analysis. We estimated that the total carbon stock increment in Japanese architectural wood in the year 2000 was nearly 3, 790, 000t-C. The estimated carbon emissions from the incineration or decomposition of unutilized and waste wood were nearly 4, 290, 000 t-C. In addition, the estimated carbon emissions via fossil fuel consumption during the produrtion and transport of architectural wood were nearly 2, 970, 000 t-C. Assuming 30 years as the average service life of buildings, the carbon assimilation in 30 years following reforestation is nearly 4, 470, 000 t-C, which exceeds the carbon emissions from architectural wood after the demolition of these buildings.
