Chisato Okai is a Japanese singer and actress, best known for her work as a member of the popular girl group Hello! Project. Born on November 22, 1996, in Chiba Prefecture, Japan, she joined the group Berryz Kobo in 2002 and gained recognition for her vocal talent and energetic performances. In addition to her music career, Chisato has appeared in various television dramas and variety shows, showcasing her versatility as an entertainer. She has also participated in solo projects, further establishing her presence in the Japanese entertainment industry.