"Bon Odori of Tsukuda Island" of 2015 started on July 13 (Mon), but ended at 21:00 on July 15 (Wednesday).
Just before the end, I looked a little bit.
In "Chuo-ku Monoshiri Encyclopedia", "The Bon Odori on Tsukuda Island, which has inherited the history since Edo, is ... It is introduced as "a dance that is worth a look that conveys the simple taste of the good old days."