Keigo Ōuchi (大内 啓伍, Ōuchi Keigo; 23 January 1930 – 9 March 2016) was a Japanese politician who served as chairman of the Democratic Socialist Party from 1990 to 1994. He led the Democratic Socialist Party into the 1993 Japanese general election. He was Minister of Health and Welfare in the Hosokawa Cabinet and Hata Cabinet. When his party merged into the New Frontier Party in 1994, Ōuchi declined to join. He instead formed the Liberal League with other independents. He joined the Liberal Democratic Party the following year. Ōuchi died of pneumonia in Tokyo on 9 March 2016, at the age of 86.
Source: “Keigo Ōuchi”, English Wikipedia (CC BY-SA 4.0), excerpt