Shihoko has a background deeply rooted in music. From an early age, she was taught how to play classical piano and later discovered her love for soul music. In college, she joined a band and further developed her passion for music. In 2002, she attended the "Soul Bird Musical School" where she learned gospel. Shihoko continued her musical education by studying voice at another music school in 2003 under the tutelage of Mineko Yamashita.