Hyokkori Hyoutanjima (ひょっこりひょうたん島; Unexpected Gourd Island) is a digital single by Kobushi Factory and Tsubaki Factory. It was released on July 17, 2018.
It is a cover of the titular theme song of the 1964 children's puppet show, which was used as the official compulsory song for the Aidorusai 2018 ~Idol Matsuri~ contest.
The music video became available for digital download on August 1, 2018.
- Hyokkori Hyoutanjima
- Hyokkori Hyoutanjima (Instrumental)