Unofficial Nogizaka46 Units
Unofficial Nogizaka46 Units refer to informally named Nogizaka46 units that are not credited in their respective songs.
The name comes from the kanji in the members' surnames: "WHITE" from Shiraishi's "白" and "HIGH" from Takayama's "高".
Shibuya Blues (2 Members)
The name comes from a combination of both of the member's names: "Ashu (あしゅ)" being Asuka's nickname, and "Mina (みな)" coming from Minami.
In 2016, they starred in drama "Shoujo no Miru Yume." In 2019, they traveled together to Spain for the program "#NogizakaSekaiTabi Konno-san Hottoite yo! (#乃木坂世界旅 今野さんほっといてよ！)"
Seifuku wo Nuide Sayonara wo... (2 Members)
The name comes from the first kanji in the members' surnames: "生" from both Ikoma and Ikuta, and "星" from Hoshino.
Mangetsu ga Kieta (3 Members)
Onsen Trio (温泉トリオ) or "The three sisters of Steam" (湯けむり三姉妹) is an unofficial Nogizaka46 unit created for the song Gomen ne, Smoothie, a song from Nogizaka46's 3rd single Umaretekara Hajimete Mita Yume.
The trio name comes from a reference to an outing that the three members took in 2014. On December 25, 2013, after recording Nogizaka46's "no", they went out for dinner together and promised to spend Christmas together the next year as well. A year later, on December 25, 2014, it was revealed on a blog that the three of them went on a day trip to the hot springs as promised. Until 2013, it seemed that these three people were not particularly close.
Gomen ne, Smoothie (3 Members)
Hana no 94nen Gumi
Hana no 94nen Gumi (華の94年組) is an unofficial Nogizaka46 unit made up of the members born in 1994 that all celebrated their "Coming of Age" Ceremony together in 2015. Notably, the 1st Generation had more members born in 1994 than any other year.