It is said that in the 4th year of Nara Yoro Period (720), Hodo Sennin, who visited the area, carved a statue of the Kannon (Goddess of Mercy) measuring over eight feet and enshrined it in a hermitage.
Later, in the mid-Heian period (961), priest Kuya Shonin, known for his Odori Nembutsu (Buddhist dancing and reciting nenbutsu), built the seven major structures.
The temple flourished as the center of Kannon worship in the Tamba region. The temple reached its peak during the Kamakura period (1185-1333), and developed into a temple with more than 25 temples under the patronage of the shoguns Hojo Tokiyori and Sadatoki.
The temple planted the hydrangea trees in accordance with the wish to offer mando-mange (lanterns and flowers) at the time of the Gokaicho (unveiling of the statue of the eleven-faced, thousand-armed, thousand-eyed Kannon), which is the principal image of the hidden Buddha.
The hydrangeas grew well in the local climate, and in season, 10,000 hydrangeas of about 100 varieties are in full bloom. The scenery of the precincts decorated with hydrangeas in a variety of colors, from pretty whites and blues to gorgeous purples and pinks, is wonderful and reminds one of a "flowery pure land".