R. Ikegami

9. The Acceleration of Earthquake Motion Deduced from Overturning of the Gravestones in Case of the Imaichi Earthquake on Dec. 26, 1949

Fuyuhiko Kishinouye, Ryohei Ikegami, R. Ikegami, 1950 .

Temporal Variation of Seismic Activity in the Region of the Pacific Coast of North-Eastern Japan

R. Ikegami, Kensuke Yamazaki, Y. Katoh, 1981 .

On the Secular Variation of Magnitude-Frequency Relation of Earthquakes (III)

R. Ikegami, 1968 .

10. A Study on the Overturning of Rectangular Columns in the case of the Nankai Earthquake on December 21, 1946

Fuyuhiko Kishinouye, Ryohei Ikegami, R. Ikegami, 1949 .