[2][3][5] Born in Kanazawa, Ishikawa prefecture,[2] Kai graduated from a high school and entered a company where she worked for one year.
She joined the manga coterie magazine Ravuri which her friend Yasuko Sakata operated when she was in high school.
[7] In 1979, when Moto Hagio, Aiko Itō, Yukiko Kai, Akiko Jō[8] and Shio Satō visited the Europe, they participated in the 37th Worldcon, Seacon '79 at Brighton, United Kingdom.
[9][10][11] After published Ryokuin Kōro in the Summer issue of Bessatsu Viva Princess in 1980, Kai spent time under medical treatment at a hospital in Kanazawa city.
[1] There are nine books of Yukiko Kai published in Princess comics by Akita Shoten.