As Tadaharu's daughter had married into the Ishikawa family, Noriyuki ISHIKAWA took over as the temple's main patron and the temple's name was changed to Shunko-in in 1636.
その後、忠晴の息女が石川家に嫁いていたことから、石川憲之（いしかわ　のりゆき）が、檀越になり、寛永13年（1636年）に、寺号を春光院と改称した。