Sakamichi Series

is a Japanese female idol group produced by Yasushi Akimoto, created as the "official rival" of the group AKB48. They are the first group from the Sakamichi Series, which also includes sister groups Sakurazaka46 (formerly Keyakizaka46), Yoshimotozaka46, and Hinatazaka46.

, formerly , is a Japanese idol girl group produced by Yasushi Akimoto. The group was created on August 21, 2015, becoming Nogizaka46's first sister group under the Sakamichi Series. The group was rebranded as Sakurazaka46 after their last concert on October 13, 2020. The group's fans are known as Buddies.

is a Japanese idol group produced by Yasushi Akimoto. The group was established as a subgroup of Keyakizaka46 named Hiragana Keyakizaka46 on 30 November 2015, and was renamed and spun off into its own group on 11 February 2019. The group's name is adopted from the alternate reading of Hyūgazaka Street in Mita, Minato-ku, Tokyo, following the custom of naming groups after sloping streets in the Sakamichi Series. The captain of the group is Mikuni Takahashi and its fans are referred to as .

series of Japanese idol groups

is a Japanese co-ed idol group produced by Yasushi Akimoto. It was created on February 21, 2018. It is Nogizaka46's second sister group, after Keyakizaka46 (now split between Sakurazaka46 and Hinatazaka46). This was named after the Osaka-based entertainment company, Yoshimoto Kogyo Holdings.