Buddhism, introduced into Japan in A.D. 552, doubtless supplied the chief incentive to the acquisition of knowledge. But had the Japanese a script of their own at any period of their history? The two oldest manuscripts which contain a reference to this subject are the Kogo-shui, compiled by Hironari in A.D. 808, and a memorial (kammori) presented to the Throne in A.D. 901 by Miyoshi Kiyotsura. Both explicitly state that in remote antiquity there were no letters, and that all events or discourses had to be transmitted orally. Not until the thirteenth century does the theory of a purely Japanese script seem to have been conceived, and its author* had no basis for the hypothesis other than the idea that, as divination was practised in the age of the Kami, letters of some kind must have been in use. Since then the matter has been much discussed. Caves used in ancient times as habitations or sepulchres and old shrines occasionally offer evidence in the form of symbols which, since they bear some resemblance to the letters of the Korean alphabet (onmuri), have been imagined to be at once the origin of the latter and the script of the Kami-no-yo (Age of the Kami). But such fancies are no longer seriously entertained. It is agreed that the so-called "letters" are nothing more than copies of marks produced by the action of fire upon bones used in divination. The Japanese cleverly adapted the Chinese ideographs to syllabic purposes, but they never devised a script of their own. *Kanekata, who wrote the Shaku Nihongi in the era 1264--1274. ETHICAL EFFECTS OF THE INTRODUCTION OF CHINESE LITERATURE