This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (August 2018) (Learn how and when to remove this message)
Ken Kagaya (加賀谷 健, Kagaya Ken, October 23, 1943 – April 24, 2014) was a Japanese politician of the Democratic Party of Japan, a member of the House of Councillors in the Diet (national legislature). A native of Tomakomai, Hokkaidō and high school graduate, he had served in the assembly of Chiba Prefecture for five terms from 1987 to 2007. He was elected to the House of Councillors for the first time in 2007.