| Masa Nakayama | |
| Native Name: | 中山 マサ |
| Native Name Lang: | ja |
| Office: | Minister of Health and Welfare |
| Term Start: | 19 July 1960 |
| Term End: | 8 December 1960 |
| Primeminister: | Hayato Ikeda |
| Predecessor: | Yoshio Watanabe |
| Successor: | Kimi Furui |
| Constituency: | Osaka Prefecture, 2nd district |
| Birth Date: | January 19, 1891 |
| Birth Place: | Nagasaki, Japan |
| Death Place: | Osaka, Japan |
| Birthname: | Masa Iida-Powers |
| Nationality: | Japanese |
| Party: | Liberal Democratic Party |
| Spouse: | Fukuzō Nakayama |
| Children: | Taro Nakayama Masaaki Nakayama |
| Alma Mater: | Ohio Wesleyan University |
was a Japanese politician and educator who was the first woman appointed to the Cabinet of Japan when she became Minister of Health and Welfare in 1960.[1]
Nakayama was born Masa Iida-Powers in Nagasaki, the daughter of Rodney H. Powers, an American businessman who had settled in Nagasaki in the 1860s, and his Japanese partner, Naka Iida. Masa attended Kwassui Jogakko, a mission school run by American Methodist missionaries. In 1911, she moved to the United States where she enrolled at Ohio Wesleyan University,[2] graduating in 1916. Returning to Japan, she had a distinguished career as a high school and college educator prior to the outbreak of World War II.[3] In 1923, Nakayama married Fukuzō Nakayama, a lawyer and politician who served in the lower house from 1932 to 1942, and later in the upper house after World War II.
In 1947, she was elected as a member of the House of Representatives in the Diet, representing the second district of Osaka Prefecture.[4] In 1960, she became the first woman appointed to the Cabinet of Japan when she was appointed Minister of Health and Welfare by Prime Minister Hayato Ikeda.[1] She served as a minister for five months, stepping down in December 1960.
Nakayama retired from the Diet in 1969, and was succeeded in her seat by her son, Masaaki. Nakayama died of throat cancer at an Osaka hospital on October 11, 1976, aged 85.[5]
Nakayama and her husband had two sons who also went into national politics: Representative Taro Nakayama and Representative Masaaki Nakayama. Representative Yasuhide Nakayama is her grandson and Masaaki's son.