This tribe had invaded the province and taken possession of the hills and valleys in the upper reaches of the river Hi, whence tradition came to speak of the tribe as a monster spreading over hills and dales and having pine forests growing on its back. The tribute of females, demanded yearly by the tribe, indicates an exaction not uncommon in those days, and the sword said to have been found by Susanoo in the serpent's tail was the weapon worn by the last and the stoutest of Orochi's followers. There is another theory equally accordant with the annals and in some respects more satisfying. It is that Susanoo and his son, Iso-takeru, when they were expelled from Yamato, dwelt in the land of Shiragi--the eastern of the three kingdoms into which Korea was formerly divided--and that they subsequently built boats and rowed over to Izumo. This is distinctly stated in one version of the Chronicles, and another variant says that when Iso-takeru descended from Takama-ga-hara, he carried with him the seeds of trees in great quantities but did not plant them in "the land of Han" (Korea). Further, it is elsewhere stated that the sword found by Susanoo in the serpent's tail was called by him Orochi no Kara-suki (Orochi's Korean blade), an allusion which goes to strengthen the reading of the legend. THE DESCENT OF NINIGI Omitting other comparatively trivial legends connected with the age of Susanoo and his descendants, we come to what may be called the second great event in the early annals of Japan, namely, the descent of Ninigi on the southern coast of Tsukushi (Kyushu). The Records and the Chronicles explicitly state that this expedition was planned in the court at Takama-ga-hara (the "plain of high heaven"), and that, after sending forces to subdue the disturbed country and to obtain the submission of its ruler, the grandson (Ninigi) of the Sun goddess was commissioned to take possession of the land. It is also clearly shown that Izumo was the centre of disturbance and that virtually all the preliminary fighting took place there. Yet when Ninigi descends from Takama-ga-hara--a descent which is described in one account as having taken place in a closed boat, and in another, as having been effected by means of the coverlet of a couch--he is said to have landed, not in Izumo or in Yamato, but at a place in the far south, where he makes no recorded attempt to fulfil the purpose of his mission, nor does that purpose receive any practical recognition until the time of his grandson Iware. The latter pushes northward, encountering the greatest resistance in the very province (Yamato) where his grandfather's expedition was planned and where the Imperial Court was held.