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