1979 年 18 巻 2 号 p. 79-88
In order to investigate the distributional history of Cryptomeria japonica in the Late Quaternary, the pollen analyses were made on six moors: Utonaito and Konuma moors in Hokkaido, and Narugo, Moniwa-Takada, Menuma and Hoshojiri moors in Tohoku district. The results show that Cryptomeria pollen increase around 2, 000y.B.P. in the investigated area except Hokkaido of the northern Japan. Cryptomeria japonica has never distributed in the Late Holocene, at least, in Hokkaido. Further, as a result of investigating many data of Tohoku district, the increasing ages of Cryptomeria pollen are 1, 500-4, 500y.B.P. in each region. From the fact, it is suggested that Cryptomeria japonica doesn't spread uniformly all over the place. Roughly speaking, from these facts and the previous many data, there is the tendency that the increasing ages of Cryptomeria pollen are newer in the north than in the south of Japan. So, it seems that Cryptomeria japonica spread from south to north after the Late Glacial Age.