Sayaka Isoyama (磯山 さやか, Isoyama Sayaka, born October 23, 1983 in Mito, Ibaraki, Japan) is a Japanese gravure idol, entertainer, actress, and sports writer who is represented by the talent agency, Hori Agency. She grew up in Hokota, Kashima District, Ibaraki.
Isoyama graduated from Ibaraki Prefecture Hokota Second High School.
