Mount Tsukuba in Tsukuba City, Ibaraki Prefecture, is known as one of the "Three Great Utagaki Mountains of Japan" along with Mount Utagaki in Settsu (Osaka Prefecture) and Mount Kijima in Hizen (Saga Prefecture).

Since the Manyo period (710-794), the area of Mt. Tsukuba have had a custom called "utagaki, Kagai (festive poem or song). This was a time when young people would gather together to pray and celebrate, dance, sing songs, and eat together, and it was also a place for courtship　and is mentioned in the Manyoshu and the Hitachi Fudoki.

Some believe that it was like an ancient disco, so we will recreate the 2023 version of "Kagai" by holding an outdoor disco in the precincts of Mt. Tsukuba Shrine, dressed in kimono.