According to "Kojimasan Kankaku-ji Engi" (The history of the Kojimasan Kankaku-ji Temple) (completed in the middle of the Edo period), Kojima-dera Temple was on the decline in the middle of the Heian period.
『子嶋山観覚寺縁起』（江戸時代中期成立）によると、子嶋寺は平安時代中期頃には一時衰退していた。