In the mountain areas that include former Kitakuwada County, including the area of this research forest, and also the northern forest part of both of former Kadono County and Otagi County bordering former Kitakuwada County, the cycle of logging and forest regeneration was repeated due to the active demand for wood in Kyoto as the area was specified as a somayama (timber forest) to secure wood for constructing the dairi (Imperial Palace) and other buildings after the relocation of the capital to Heian-kyo.
当研究林のエリアも含めた旧北桑田郡及び隣接する旧葛野郡・愛宕郡両郡北部の山林地域は、平安京遷都以降内裏の造営をはじめとした建築用材確保のための杣山として指定されるなど、旺盛な京都の材木需要に支えられて伐採～更新のサイクルが繰り返されていた。