Up Up Girls (2)
- Takahagi Chinatsu (高萩千夏)
- Yoshikawa Mayu (吉川茉優)
- Kajishima Aya (鍛治島彩)
- Hashimura Riko (橋村理子)
- Nakaoki Rin (中沖凜)
- Nakagawa Chihiro (中川千尋)
- Sasaki Honoka (佐々木ほのか)
An audition for a second generation of Up Up Girls was announced at the Up Up Girls (Kakko Kari) Nippon Budokan concert, though it was not specified if the winners would be members of the group or part of a new sister group. An age limit of 12 to 23 years old was also reported, but starting and ending dates for the audition were not given.
On February 25th, the winners of the audition were announced consisting of Takahagi Chinatsu, Hashimura Riko, Kajishima Aya, and Yoshikawa Mayu. The group had decided to call them Up Up Girls (2) for the time being and would debut on Up Up Girls (Kakko Kari)'s next single.
In a surprise announcement on March 18th, another member was announced, Nakaoki Rin to join Up Up Girls (2). The five girls debuted on Up Up Girls (Kakko Kari)'s "Upper Disco / FOREVER YOUNG" single. A unit single was released on August 15th featuring only the second generation members, titled "Sun!×3 / Ninoashi Dancing".
- [2017.08.15] Sun!×3 / Ninoashi Dancing (二の足 Dancing; Hesitant Dancing)
- [2018.01.01] Doshaburi no Terrace Seki / Fuyu Tote Tote (どしゃぶりのテラス席 / フユトテトテ)
- [2018.05.01] Tte Iu Hatsukoi no Oyakusoku / Happiece LOVE♡ (っていう初恋のお約束 / ハッピースLOVE♡)
- [2018.08.07] Zenbu Seishun! / Angel Enjite 20nen (全部青春! / エンジェル演じて20年)
- [2018.12.25] Kakatte Kinasai / OVER DRIVE (かかって来なさい / OVER DRIVE)
- [2019.04.02] untitled