A "Nogizaka46 New Project" is announced during Nogizaka46's 3rd Year Birthday Live — a project which would later become Toriizaka46. (鳥居坂46)
Beginning of the auditions for the group.
Final day of the examination, the 1st generation composed of 22 members is officially unveiled, while the group's name is changed to Keyakizaka46 (欅坂46).
There have been numerous speculations as for why the original name was dropped, but the most common one is because the "Keyakizaka" alley (known for its luxurious shops and mansions) is a much more rich and prestigious venue than "Toriizaka".
Suzuki Mizuho leaves the group before their debut.
Keyakitte, Kakenai?, Keyakizaka46's first TV show, starts airing every sundays on TV Tokyo. It is hosted by Teruyuki Tsuchida and Yuu Sawabe.
Harada Mayu leaves the group after photos of her and her boyfriend from when she was 16, and who was her former middle school teacher, surfaced online. She can still be seen in a few Keyakitte, Kakenai? episodes with her face blurred.
The group's first event, held at Tokyo Zepp DiverCity, where the members displayed their unique skills for the first time to the public.
The undergroup "Hiragana Keyakizaka46" is revealed during an episode of Keyakitte, Kakenai? along with its first member, Nagahama Neru.
The group performed Seifuku no Mannequin, a well-known Nogizaka46 song, as the opening act of LIVE EXPO TOKYO 2016 ALL LIVE NIPPON VOL.4 making it the girls' 1st live performance on stage.
The group held their first concert, called Keyakizaka46 Debut countdown Live where they performed all of their upcoming songs including Silent Majority. It is one of their few lives that have been aired on TV and as such can still be found online.
Keyakizaka46 gets their first radio show, named Keyakizaka46 Kochira Yurakucho Hoshizora Housoukyoku. It is a 15-min-long radio show hosted by Hirate Yurina + another changing member each week.
Release of the group's debut single, Silent Majority.
The 11 members of the 2nd Generation of Keyakizaka46 who will become Hiragana Keyaki are officially unveiled.
The group's 2nd TV program starts airing. It is Keyakizaka's counterpart to AKBINGO&NOGIBINGO.
Keyakizaka46's first drama Tokuyama Daigoro wo Dare ga Koroshita ka? (Who killed Tokuyama Daigoro?) start airing.
Release of the group's 2nd single, Sekai ni wa Ai Shika Nai. It is also TokuDare's opening song.
Release of the group's 3rd Single, Futari Saison.
Release of the group's 4th Single, Fukyouwaon.
Announce of Keyakizaka46's first national tour in August. The tour will cover Hyogo, Fukuoka, Aichi, Miyagi, Niigata and Chiba for a total of 11 perfomances.
Release of the group's first album, Masshirona Mono wa Yogoshitaku Naru.
Just a few days before the start of their national tour, Keyakizaka46 held a one-man live at Fuji-Q Highland on the 22-23 July. It is famous for having a setup making it look as though Keyakizaka had created a republic for itself, hence its name. You can read a report on the attached link.
Opening day of the group's first national tour in Hyogo. You can find the setlist here.
Nagahama Neru announced on Keyakitte, Kakenai? that she would leave Hiragana Keyakizaka to become a full-time member of Kanji Keyakizaka.
Release of the group's 5th Single, Kaze ni Fukaretemo.