History: STU48 1st Generation
- See also STU48 3rd Draft.
- February 22 – Kennin for Okada Nana (AKB48) and Sashihara Rino (HKT48) announced.
- March 19 – 1st Generation members (31) are announced: Ishida Chiho, Ishida Minami, Isogai Kanon, Ichioka Ayumi, Imamura Mitsuki, Iwata Hina, Otani Marina, Ozaki Mami, Kai Kokoa, Kadota Momona, Kadowaki Miyuna, Kuroiwa Yui, Sakaki Miyu, Sano Haruka, Shioi Hinako, Shintani Nonoka, Sugahara Saki, Takino Yumiko, Tanaka Kouko, Taniguchi Mahina, Cho Orie, Torobu Yuri, Hyodo Aoi, Fukuda Akari, Fujiwara Azusa, Mishima Haruka, Mineyoshi Arisa, Mori Kaho, Morishita Maiha, Yano Honoka, Yabushita Fu
- November 18 – Kuroiwa Yui graduates from STU48
- November 25 – Sashihara Rino cancels her kennin position with STU48
- March 25 – Ozaki Mami graduates from STU48
- April 13 – Cho Orie graduates from STU48
- July 22 – Shioi Hinako graduates from STU48
- April 13 – Sano Haruka graduates from STU48
- April 16 – Shonichi of STU48 GO!GO! little SEABIRDS!!
- May 6 – Sugahara Saki graduates from STU48
- August 6 – Ichioka Ayumi graduates from STU48
- August 11 – Kadota Momona graduates from STU48
- October 30 – Torobu Yuri graduates from STU48
- December 8 – Mishima Haruka graduates from STU48
- December 12 – Mori Kaho graduates from STU48
- December 20 – Senshuuraku of STU48 GO!GO! little SEABIRDS!!
- January 11 – Shonichi of STU48 Bokutachi no Koi no Yokan
- January 19 – Okada Nana resigns as captain of STU48
- March 10 – Fujiwara Azusa graduates from STU48
- May 10 – Isogai Kanon graduates from STU48
- July 31 – Shintani Nonoka graduates from STU48
|STU48 1st Generation|
| Ishida Chiho | Ishida Minami | Imamura Mitsuki | Iwata Hina | Okada Nana | Kai Kokoa | Kadowaki Miyuna |
Sakaki Miyu | Takino Yumiko | Taniguchi Mahina | Hyodo Aoi | Fukuda Akari | Mineyoshi Arisa | Morishita Maiha | Yano Honoka