Oyama Toshiko (大山寿子, 22 December 1920 - 7 December 2012 in Tokyo, Japan) was a Japanese, female professional 5-dan of the Nihon Ki-in. She was a pupil of Kita Fumiko.
- 1941: 1-dan
- 1947: 2-dan
- 1951: 3-dan
- 1964: 4-dan
- 1995: 5-dan
- Nihon Kiin profile: http://www.nihonkiin.or.jp/player/htm/ki001031.htm
- She visited the United States for promotional teaching purposes in 1962.