January
- 8 - 1st Single - Merry Christmas! - Released
- 10 - Hanasaki Miki graduates
- 12 - Kobayashi Haruna joined
June
- 18 - Dem Boiz 1st Single - All Star - Released
- 19 - Kashima Rika, Kobayashi Haruna, Kurosawa Yuka, Saegusa Miria, and Yamada Fumi to have kennin positions in new sister group, Teriyakizaka46. Saegusa Miria to go under a different stage name, Sasaki Miu.
July
- 1 - Name officially changed to YME48
- 6 - Amami Emi joined
- 7 - Members of YME48 split into teams
- Team Y: Amami Emi, Kashima Rika, Kobayashi Haruna, Tsuzuki Rika, Yamada Fumi (Captain), Yamamoto Ami
- Team M: Minegishi Mariko, Mizuhara Marina, Nishikawa Popuri (Captain), Watanabe Yuki, Yamamoto Amina
- Team E: Kurisu Sayuri, Kurosawa Yuka, Saegusa Miria, Sakura Yuki, Tsutsui Natsuko
- Team Y: Amami Emi, Kashima Rika, Kobayashi Haruna, Tsuzuki Rika, Yamada Fumi (Captain), Yamamoto Ami
- 27 - Kaji Asuhi and Sayuwatari Mei joined