Yoshino Sakuzo is often called "the most significant political scientist in Taisyo era". His legal logic and his work should not be ignored. With a view of Yoshino as a political scientist, we must pay great attention to work of this great jurist. Yoshino strongly demanded Democracy in Japan. Especially he insisted on the party government system, because he wanted to reflect the public opinion thorough the general election. He also made an effort to establish the convention of the constitution. Although the corruption of two major parties disappointed him and most Japanese people, normal constitutional practice was repeated and put an emphasis on. Finally, Yoshino's ideal did not come true. From 1932 to 1945, normal constitutional practice was abolished. However, every cabinet could not ignore the House of Representative. The convention of the constitution, in which the cabinet distrusted by the House of Representative selects the choice of resignation or the dissolution, remained. Yoshino idealized british constitutional government, and demanded the practice and the convention in Japan. Though he never admired american constitutional code, Yoshio is nowadays considered Wilsonian or Wilsonist. We must correct such an evaluation of him.
