On the publication of this monograph, the authors should like to express their sincere gratitude to Mr. Seiho Oyama, who gave every possible support and assistance to the excavation of the Minatogawa site.

The authors are also grateful to Mr. T. Yada, the photographer, who kindly took photographs of the Minatogawa skulls for the present report.

The authors are also deeply indebted to Professor Eizo Inagaki, the editor-in-chief, and to the editors of the Bulletin of the University Museum, the University of Tokyo, for their kind support for the publication of this report.

This study was supported by the Grant-in-Aid for Scientific Research (1978, No. 334057) of the Ministry of Education, Science and Culture, Japan.