Kobushi Factory was a Japanese idol group formed on January 2, 2015, under the
Hello! Project by its founder Tsunku♂. The group initially consisted of eight
members from the Hello! Pro Kenshūsei and Nice Girl Project training programs.
Kobushi Factory made their debut with the DVD single "Nen ni wa Nen / Survivor"
in March 2015, which featured songs from the musical Week End Survivor. Their
first major CD single, "Dosukoi! Kenkyo ni Daitan / Ramen Daisuki Koizumi-san no
Uta / Nen ni wa Nen (Nen’iri Ver.)", was released on September 2, 2015. The
group's first album, Kobushi Sono I...