| Hiroko Kurumizawa | |
| Native Name: | 胡桃沢 ひろこ |
| Native Name Lang: | ja |
| Birth Date: | January 4, 1974[1] |
| Birth Place: | Niigata, Japan |
| Years Active: | 1991–present |
| Associated Acts: | Sakurakko Club |
is a Japanese singer. In 1991, she became a member of Sakurakko Club, together with Anza Oyama, Miki Nakatani, Miho Kanno, and Noriko Katō. Her real name is .