Yao is the birthplace of the Kawachi Ondo, and the "Nagashibushi Seicho Kawachi Ondo" handed down at Jokoji Temple is considered its prototype and has been selected as one of the "100 Best Sounds of Japan" (former Environment Agency). Preservation society members practice and sing this unique song on the temple grounds, reverberating loudly through the packed grounds every August 23rd and 24th. In 1385, Matagoro-dayu Fujiwara Moritsugu restored the temple. In 1390, Ashikaga Yoshimitsu designated it as a place of prayer and presented a plaque bearing the words "Hatsuhiyama" and "Jokoji," and the temple was renamed Jokoji. In 1615, during the Summer Siege of Osaka, Tokugawa Todo Takatora set up camp here, and the blood-stained edging from the beheading that took place there remains today as the "blood ceiling."