In terms of vegetation, the laurel forests were limited along the coasts of Kyushu and Shikoku as well as the coast of the Pacific from the Kanto region and to the west in the first half of the earlier Jomon period; the deciduous forests were predominant in other regions.
植生面から見ると、縄文早期前半は照葉樹林帯は九州や四国の沿岸部および関東以西の太平洋沿岸部に限られており、それ以外の地域では落葉樹が優勢であった。