| Yuya Niwa | |
| Office1: | Minister of Health and Welfare |
| Primeminister1: | Yoshirō Mori |
| Term Start1: | 5 April 2000 |
| Term End1: | 4 July 2000 |
| Predecessor1: | Himself |
| Successor1: | Yūji Tsushima |
| Primeminister2: | Keizō Obuchi |
| Term Start2: | 5 October 1999 |
| Term End2: | 5 April 2000 |
| Predecessor2: | Sohei Miyashita |
| Successor2: | Himself |
| Primeminister3: | Kiichi Miyazawa |
| Term Start3: | 12 December 1992 |
| Term End3: | 9 August 1993 |
| Predecessor3: | Tokuo Yamashita |
| Successor3: | Keigo Ōuchi |
| Birth Date: | 20 April 1944 |
| Birth Place: | Niihari, Japan |
| Party: | Liberal Democratic Party |
| Alma Mater: | Keio University |
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.
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