Mayuzaka46 (まゆ坂46Mayuzaka46?), or Mayu46 to some, is a special AKB48 and Nogizaka46 collaboration unit created for the song Twintail wa Mou shinai from the single Otona Jelly Beans.
The official members of the sub-unit were introduced in "Nogizaka46 Under Live Second Season". They performed Kaze no Rasen, the Type-D coupling song for Kibouteki Refrain, AKB48's 38th single.
Watanabe Mayu and Nogizaka46 previously worked together in the drama Saba Doru, where Mayuyu was transferred to Nogizaka46, and then withdrew in preparation for her solo debut.
Ikoma Rina and Nakada Kana are the only two Nogizaka46 members to be a part of both collaboration units.