Yuya Niwa (丹羽 雄哉 Niwa Yūya, born April 20, 1944) is a Japanese politician of the Liberal Democratic Party (LDP), a former member of the House of Representatives in the Diet (national legislature). A native of Niihari District, Ibaraki and graduate of Keio University he was elected for the first time in 1979 after working as a writer for Yomiuri Shimbun. Later, he served as the Minister of Health in 1992 and in 1999.
He was defeated by Democratic Party of Japan(DPJ)-backed candidate Hiroko Ōizumi（former Lieutenant Governor of Yamaguchi Prefecture）in the Japanese general election, 2009.