Mine became interested in Western music by listening to his mother's record collection. He also learned to play the steel guitar, a comparatively rare talent at the time in Japan, which gained him session work for Nippon Columbia backing well-known singers such as Miss Columbia among others. After graduating, a recommendation from his father led to a bank clerk job. The young Mine, however, abandoned the banking profession determined to make a career in music. It was working as a singer and drummer with Noriko Awaya's backing orchestra on the dance hall circuit that Mine began to win fame. He was later approached by Teichiku Records with a record contract, resulting in the beginning of his recorded singing career and the founding of his own band.