When his father died in 1613, he took over as the head of the family and moved to Kishiwada; therefore, his younger brother Yoshichika KOIDE succeeded Izushi Domain.
慶長18年（1613年）、父が死去すると家督を継ぎ、岸和田に移ったため、出石は弟の小出吉親が継ぐこととなった。