Universal Manhood Suffrage Law

The Universal Manhood Suffrage Law (普通選挙法, Futsū Senkyo Hō) was a law passed in Taishō period Japan, extending suffrage to all males aged 25 and over in accordance with the principle of universal manhood suffrage, also known as "one man, one vote". Proposed by the Kenseitō political party, the law was enacted thanks to activism by the Universal Suffrage Movement in Japan and decades of organizing by the Universal Suffrage League.

Source: Wikipedia — Universal Manhood Suffrage Law (CC BY-SA 4.0)