原敬
The median age of a Prime Minister first taking office is roughly 61 years and 123 days. This falls between Katō Tomosaburō and Hara Takashi. The youngest Prime Minister was the first, Hirobumi Itō, who took office at the age of 44 years, 67 days. The oldest Prime Minister to first take office was Kantarō Suzuki, who became Prime Minister at the age of 77 years, 79 days.