Fagus crenata Fagus crenata Fagus crenata, known as the Japanese beech, Siebold's beech, or buna, is a deciduous tree of the beech genus, "Fagus", of the family Fagaceae. It is native to Japan, where it is widespread and often one of the dominant trees of Japan's deciduous forests. It is found from the Oshima Peninsula in Hokkaidō south to the Ōsumi Peninsula in Kyūshū. In north-east Honshū it grows in large stands from sea level up to but in the south-west of its range it is restricted to mountainous areas and occurs in small, isolated populations. It grows in well-drained, loamy or
Fagus sylvatica in the buds. In autumn, the tree builds the reserves that will sustain it into spring. Given good conditions, a bud can produce a shoot with up to ten or more leaves. The terminal bud emits a hormonal substance in the spring that halts the development of additional buds. This tendency, though very strong at the beginning of their existence, becomes weaker in older trees. It is only after the budding that root growth of the year begins. The first roots to appear are very thin (with a diameter of less than 0.5 mm). Later, after a wave of above