Takashi HARA was the first serving councilor of the House of Representatives who became the Prime Ministor and out of 33 Prime Ministers under the Constitution of the Empire of Japan, there were only two more such cases: Osachi HAMAGUCHI and Tsuyoshi INUKAI.
現役の衆議院議員で首相となったのは原敬が初めてであり、大日本帝国憲法下の33人の首相の中では、濱口雄幸、犬養毅を併せた3人に留まっている。