| Masayoshi Nataniya | |
| Native Name Lang: | ja |
| Office: | Member of House of Councillors |
| Term Start: | 11 July 2004 |
| Constituency1: | National PR |
| Birth Date: | 3 August 1957 |
| Birth Place: | Yokohama, Kanagawa, Japan |
| Party: | CDP |
| Otherparty: | |
| Alma Mater: | Yokohama National University |
| Website: | Official website |
is a Japanese politician of the Constitutional Democratic Party[1] and a member of the House of Councillors in the Diet (national legislature). A native of Yokohama, Kanagawa and graduate of Yokohama National University, he was elected for the first time in 2004.