Keyakizaka46 is a Japanese Idol Group produced by Akimoto Yasushi and the 1st sister group of Nogizaka46. The group was announced on June 27, 2015, and held their first round of auditions from June 28 to August 21, 2015. The 1st Generation members were announced on August 21, 2015. They were known as Toriizaka46 until their debut, when the name was changed.