About SAKAI TAKESHI
About 森林研究・整備機構 森林総合研
About natural regeneration
About broad-leaved forest
About broad-leaved tree
About Cryptomeria japonica
About Chamaecyparis obtusa
About Thujopsis
About Fagus crenata
About artificial forest
About natural forest
About Hiba arborvitae
About Natural regeneration of forests
About 天然更新
About 期待