To mourn his father Motonaga MIYOSHI, in 1557, Nagayoshi constructed Nanshu-ji Temple on Mt. Ryuko under the auspices of Rinzai sect Daitoku-ji school, for which Daitoku-ji ninetieth Dairin Soto who Nagayoshi had respected was determined as kaisan (a founder of temple as the first chief priest).
長慶は父・三好元長の菩提を弔うため、弘治(日本)3年（1557年）、臨済宗大徳寺派の寺院、龍興山南宗寺を長慶の尊敬する大徳寺90世大林宗套を開山として創建した。