Ai Kago is a Japanese singer, actress, author and former Guinness World Record holder.
At age 12, Kago won the 4th National Audition of Morning Musume held by the Up-Front Works Agency in 2000, which led to her admission into the extremely popular idol group as a 4th generation member. In the same year, she became a founding member of Minimoni. In 2004, she graduated from both the aforementioned groups and formed W with Nozomi Tsuji.
In 2006, photos of the under-age Kago smoking were leaked by the media. As a result, she was immediately suspended for one year by Up-Front Agency. In 2007, toward the end of her suspension, she was caught once again smoking. This resulted in her contract being terminated permanently.