Takayo Ookoshi (大越貴代, ŌKoshi Takayo?), born on June 13, 1985 in Hokkaidō, Japan, was the leader of the all-girl J-pop band ZONE. In late 2003, she announced her graduation from ZONE to pursue her studies.

Takayo, as of 2007, is currently engaged in a solo career and has released her first album, titled My Best Friends, on June 6, 2007.