Abstract
The relationship between climatic factors and annual ring and latewood width of kuromatsu on the coast in Kochi were investigated using multiple regression analysis. Precipitation in March, November and the previous March and temperature in June, the previous June and October were directly related to annual ring width, while precipitation in September and October and temperature in April, July and the previous September were inversely related to annual ring width. Also precipitation in August, the previous April and August and temperature in November, the previous March and July were directly related to latewood width, while the precipitation in the previous November and temperature in the previous June were inversely related to latewood width. Climate of early or before and late growth seasons seems to have the greatest effect on annual ring width of kuromatsu in Kochi
