New Kenshuusei unit
2015 is the year that a new Kenshuusei unit was formed and Berryz Koubou went on indefinite hiatus.
Members
- January 1: Morning Musume '14 becomes Morning Musume '15.
- January 2: New Kenshuusei unit is formed consisting of eight members; Hamaura Ayano, Taguchi Natsumi, Ogawa Rena, Nomura Minami, Wada Sakurako, Fujii Rio, Hirose Ayaka and Inoue Rei.
- March 3: Berryz Koubou goes on indefinite hiatus.
Singles
- January ?: TBA - Country Girls
- February 4: Taiki Bansei / Otome no Gyakushuu - ANGERME
- March ?: TBA - TBA
- ??: TBA - Morning Musume '15
Albums
- January 21: Kanjuku Berryz Koubou The Final Completion Box - Berryz Koubou (last)
DVD Singles
- TBA
DVDs
- January
- January 7: Alo-Hello! 7 Morning Musume DVD (DVD, Blu-ray)
- January 7: Japan Expo 15th Anniversary: Berryz Kobo×℃-ute in Hello!Project Festival
- January 23: Morning Musume '14 Live Concert in New York
- February
- February 11: Morning Musume '14 Concert Tour Aki GIVE ME MORE LOVE ~Michishige Sayumi Sotsugyou Kinen Special~ (DVD, Blu-ray)
- February ?: Greeting ~Sasaki Rikako~ - Sasaki Rikako (Blu-ray)
Concerts
- January 2 - February 15: Hello! Project 2015 WINTER
- February 28 - March 3: TBA (Berryz Koubou Final Concert Tour)
- February 13 - March 8 :℃-ute Naruchika 2015 tour
- March 8 - March 22: Hello Pro Kenshuusei Happyoukai 2015 ~3gatsu no Nama Tamago Show!~
- March 14 - April 29: Morning Musume '15 Concert Tour Haru ~GRADATION~
- March 14 - May 5: ANGERME Starting Live Tour 2015 Spring
- March 21 - April 26: ℃-ute Concert Tour Haru
- March 28 - March 29: Hello! Project Hina Fest 2015
- June 11: TBA (℃-ute 10th Anniversary Concert)
Events
- January 7: Ishida Ayumi Birthday Event 2015
- January 19 - January 20: Berryz Koubou FC Event 2015
- January 21 - January 23: Berryz Koubou Fanclub Tour in Okinawa "Toraberryz.com FINAL!!"
- January 23: Berryz Koubou Special Live Vol.2 @ COTTON CLUB
- March 2 - March 3: Berryz Koubou 3 Getsu 3 Nichi Concert ga mireru ~Very Very Kandou Tour~
- March 28 - March 29: Forest For Rest SATOYAMA & SATOUMI e Ikou 2015
Other
- September 14: Morning Musume 18th Anniversary Event