Laboratory journals by Dr. Hideki Yukawa published on the Internet for the very first time! Records of Dr. Yukawa's research during his time as an assistant professor at Osaka Imperial University revealed!

• Overview

On July 6, the Osaka University Yukawa Memorial of the Osaka University Museum and the Kyoto University Yukawa Hall Archival Library of the Yukata Institute for Theoretical Physics at Kyoto University collaborated , for the very first time, to publish the "Yukawa Laboratory Theory Colloquium Records," a research diary written by Dr. Yukawa himself while serving as an assistant professor at Osaka Imperial University in 1938. These records can be viewed at the websites of both facilities.

In 1933, Dr. Yukawa began to work as a part-time lecturer at the School of Science at Osaka Imperial University, becoming a full-time lecturer in 1934 and from 1936~1939, serving as an assistant professor in the same school. During this time, he performed research in particle physics, developing his meson particle theory. It’s notable that the results of his first thesis on meson particle theory presented in November 1934 led to Dr. Yukawa becoming the first Japanese recipient of the Nobel Prize in 1949.

In order to inform the public about the research materials he left behind and generate people’s interest in science, both institutes have published the first half of the first volume (s04-19-01) of Dr. Yukawa's 15 journal series kept by the Kyoto University Yukawa Hall Archival Library of the Yukata Institute for Theoretical Physics at Kyoto University on their websites.

Fig. 1: The cover of Theory Colloquium Records

Fig. 2: The first page of the record of Theory Colloquium XV (15). This page states that TAKETANI Mitsuo introduced a research paper by Frohlich, et al. in the colloquium that began at 1:30 pm on June 18 in Room 167 with six people in attendance.

• About the Yukawa Laboratory Theory Colloquium Records

On the cover of the published laboratory journal , you can find the titles written by Dr. Yukawa: "Theoretical Physics Laboratory Records (Kyoto Imperial University)" and "Theory Colloquium Records (Osaka Imperial University), 1938-1939, I" (Figure 1). The first half of this notebook is a record of 31 entries of laboratory activity from April 21 to December 23, 1938, a period in which Dr. Yukawa was serving as an assistant professor at Osaka Imperial University.

Dr. Yukawa was appointed as a professor at the Physics Laboratory in Kyoto Imperial University's School of Science on May 26, 1939.

The second half of this notebook is a record of his research activity after he moved to Kyoto Imperial University.