This study aims to obtain the whole genome sequences of a deciduous broadleaved tree, Fagus crenata that dominates in cool-temperate deciduous forests in the Japanese archipelago. The goal of this project is to identify the adaptive genes associated with various environments where the species grow. To this end, the whole genome sequences obtained are utilized to detect the outlier SNP loci in GWAS and population genetic researches. This project will facilitate establishing better management systems for the species in the forest tree breeding programs for conversion to broadleaved forests and the conservation programs of natural forests against the global climatic changes.