Sakomizu is well known for serving as the chief secretary to Prime Minister Kantarō Suzuki's Cabinet (April–August 1945).

Both the air raids and the conquered Japanese territories captured by the United States of America had caused a "great disruption of land and sea communication and essential war production.

"[1] In addition, coal and oil supplies were found to be in rapid decline, as well as health and support for the war effort.

Sakomizu served as a government officer of the Ministry of Finance in various governmental workplaces until 1945.

After WW2, he became a member of the House of Representatives and then joined Liberal Democratic Party.