He graduated with a law degree from Kyoto Imperial University in 1906, after which he worked at the office of the Governor-General of Taiwan, and later as a bureaucrat at the Ministry of Education.

[1] In response, Yamazaki formed the small Shōwakai political party, together with Tokonami Takejirō in 1935, and was reelected again in the 1936 General Election.

One of the conditions imposed by Hayashi is that Yamazaki renounce his political party affiliation.

[2] In 1938, Yamazaki returned to the Rikken Seiyūkai, but to the reform faction headed by Chikuhei Nakajima.

In 1940, he was one of the primary members creating the League of Diet Members Supporting the Prosecution of the Holy War and supported the creation of a one-party state under the Imperial Rule Assistance Association, serving as policy chief, standing affairs chief and finally as Deputy Chairman.