Yaginuma (written: 柳沼 or 八木沼) is a Japanese surname and may refer to:
- Hiroka Yaginuma (柳沼 寛香?) (born 1981), Japanese professional wrestler
- Junko Yaginuma (figure skater) (八木沼 純子?) (born 1973), Japanese figure skater
- Junko Yaginuma (model) (柳沼 淳子?) (born 1978), Japanese model
- Kou Yaginuma (柳沼 行?) (born 1973), Japanese manga artist
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