Emperor Saga, a son of Emperor Kanmu, had also deep confidence in Genpin and, by his order, Genpin prayed for the recovery from illness of Emperor Heizei, Emperor Saga's older brother in 809, and received summer and winter gifts such as books and cloth for seven years starting in 811.
桓武天皇の子嵯峨天皇の信任も厚く、809年（大同(日本)4年）招請を受けて嵯峨天皇の兄平城天皇の病気平癒を祈願し、811年（弘仁2年）から7年間夏と冬に慰問の書や布を賜っている。