R. Takahasi

The Eruption of Komagatake, Hokkaido, in 1929

F. Kishinouye, H. Tsuya, N. Miyabe, 1930 .

Changes in the Vertical Intensity of Geomagnetism that Accompanied the Eruption of Miyakezima, in 1940.

R. Takahasi, K. Hirano, 1941 .

Tilting Motion of the Earth Crust caused by Tidal Loading

R. Takahasi, 1929 .

“SMAC” Strong Motion Accelerometer

Ryutaro Takahasi, R. Takahasi, 1953 .

28. On the Iturup Tsunami of Oct. 13, 1963, as Observed along the Coast of Japan

T. Hatori, R. Takahasi, 1964 .