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In page Yo Hitoto:

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She graduated from the department of Environmental Information of Keio University and participated in the Keio University a cappella group, K.O.E., during her days as a student. She used to have live concerts on the street with fellow K.O.E. members before she met Yōichi Kitayama, a member of the famous Japanese a cappella group the Gospellers. Kitayama encouraged Hitoto to compose her own music. Before this encounter, she had been a backup singer for many other artists.[citation needed]