philological research as Austroasiatics, who formed the original stock
of the Australian aborigines; they survived in India as the Munda
tribes, in Indo-China as the Mon-Khmer, and also remained in pockets on
the islands of Indonesia and especially Melanesia. All these peoples had
migrated from southern China. The peoples with the oval-axe culture are
the so-called Papuan peoples in Melanesia; they, too, migrated from
southern China, probably before the others. Both groups influenced the
ancient Japanese culture. The rectangular-axe culture of north-west
China spread widely, and moved southward, where the Austronesian peoples
(from whom the Malays are descended) were its principal constituents,
spreading that culture also to Japan.

Thus we see here, in this period around 4000 B.C., an extensive mutual
penetration of the various cultures all over the Far East, including
Japan, which in the palaeolithic age was apparently without or almost
without settlers.


5 _The eight principal prehistoric cultures_

In the period roughly around 2500 B.C. the general historical view
becomes much clearer. Thanks to a special method of working, making use
of the ethnological sources available from later times together with the
archaeological sources, much new knowledge has been gained in recent
years. At this time there is still no trace of a Chinese realm; we find
instead on Chinese soil a considerable number of separate local
cultures, each developing on its own lines. The chief of these cultures,
acquaintance with which is essential to a knowledge of the whole later
development of the Far East, are as follows: