The group was rebranded as Sakurazaka46 (櫻坂46) on October 14, 2020.
- 1 2015
- 2 2016
- 3 2017
- 4 2018
- 5 2019
- 6 2020
- 22 - A "Nogizaka46 New Project" is officially announced during the Nogizaka46's 3rd YEAR BIRTHDAY LIVE, what would later become Keyakizaka46.
- 27 - Auditions start for what is then known as "Toriizaka46" (鳥居坂46).
- 21 - Final examinations end and 22 people are officially unveiled as the 1st Generation. The group's name is changed from "Toriizaka46" to "Keyakizaka46".
- 17 - Suzuki Mizuho leaves the group.
- 4 - Keyakitte, Kakenai?, the group's first own TV program, starts.
- 11 - Harada Mayu leaves the group without any send-off activities.
- 14 - Blogs for each member are launched.
- 14 & 15 - The group's first event, a "Choose your most noticeable member" introduction meet, is held at Tokyo Zepp DriverCity.
- 30 - Hiragana Keyakizaka46 is unveiled during an episode of Keyakitte, Kakenai?, and along with it Nagahama Neru as its first member.
- 16 - The group appears on "2015 FNS Song Festival THE LIVE", where they perform Seifuku no Mannequin with Nogizaka46 and AKB48, marking their first TV performance.
- 19 & 20 - The group holds mini handshake events across the Kanto region.
- 30 - The group performs Seifuku no Mannequin as the opening act at LIVE EXPO TOKYO 2016 ALL LIVE NIPPON VOL.4, making it their first live performance.
- 7 - The group's first CMs are released for the brand mechakari. This is also when fans had the opportunity to first hear the single Silent Majority.
- 17 - Keyakizaka46 Debut Countdown Live is held as the group's first mini-concert, showing off all songs on the then upcoming Silent Majority single.
- 1 - Keyakizaka46 Kochira Yurakucho Hoshizora Housoukyoku, Keyakizaka46's first radio show, starts broadcasting.
- 6 - Silent Majority, Keyakizaka46's first single, is released.
- 8 - The 1st Generation of Hiragana Keyakizaka46 members are officially unveiled.
- 5 - KEYABINGO!, the group's 2nd TV program and a revival of AKB48's AKBINGO!, starts.
- 17 - Keyakizaka46's first drama Tokuyama Daigoro wo Dare ga Koroshita ka? is aired.
- 6 & 7 - The group performs at Tokyo Idol Festival 2016.
- 10 - Sekai ni wa Ai Shika Nai, Keyakizaka46's 2nd single, is released.
- 30 - Futari Saison, Keyakizaka46's 3rd single, is released.
- 24 & 25 - Keyakizaka46 One Man Live is held as the group's first solo concert.
- 28 - The group performs at COUNTDOWN JAPAN 16/17. They continue to perform there every year until 2019.
- 31 - The group performs at the 67th NHK Kouhaku Uta Gassen, marking their 1st appearance on the program.
- 21 - Sugai Yuuka was announced as the captain of Keyakizaka46, and Moriya Akane the Vice-Captain, at the national handshake event held at Makuhari Messe.
- 21 & 22 - Hiragana Keyakizaka46 perform their first live, Keyakizaka46 Zepp Tokyo Kouen.
- 31 - Hiragana Keyakizaka46 begins their first tour, Hiragana National Tour 2017. The tour continues until December 13, 2017.
- 5 - Fukyouwaon, Keyakizaka46's 4th single, is released.
- 6 - Keyakizaka46 1st Anniversary Live is held.
- Additionally, auditions for Hiragana Keyakizaka46 2nd Generation are announced at the live.
- 18 - The group's second drama Zankoku na Kankyakutachi airs on Nippon TV. The show airs until July 20, 2017.
- 19 - Masshirona Mono wa Yogoshitaku Naru, Keyakizaka46's 1st Album, is released.
- 22 & 23 - Keyaki Republic 2017 is held, the first of the Keyaki Republic Concert Series.
- 2 - 30 - Keyakizaka46 National Tour 2017 "Masshirona Mono wa Yogoshitaku Naru", Kanji Keyakizaka46's first tour, is held.
- 5 - The group performs at Tokyo Idol Festival 2017.
- 12 - The group performs at ROCK IN JAPAN FES. 2017. They continue to perform there every year until 2019.
- 19 & 20 - The group performs at popular music festival SUMMER SONIC 2017.
- 25 - Kaze ni Fukarete mo, Keyakizaka46's 5th single, is released.
- 31 - The group performs at the 68th NHK Kouhaku Uta Gassen, marking their 2nd appearance on the program.
- 7 - Glass wo Ware!, Keyakizaka46's 6th single, is released.
- 6 - 8 - Keyakizaka46 2nd YEAR ANNIVERSARY LIVE is held. This is the first live where different members, aside from Hirate Yurina, performed as center for the songs.
- 1 - Sakamichi Joint New Member Recruitment Audition opens, recruiting members for both Kanji and Hiragana Keyakizaka46.
- 3 - Hiragana Keyakizaka46 performs at Tokyo Idol Festival 2018.
- 4 - The group performs at ROCK IN JAPAN FES. 2018.
- 15 - Ambivalent, Keyakizaka46's 7th single, is released.
- 11 - Keyakizaka46 Summer Arena Tour 2018 begins. The tour continues until September 5, 2018.
- 4 - Imaizumi Yui graduates from the group.
- 16 - Shida Manaka graduates from the group.
- 16 - 25 - Kobayashi Yui, Habu Mizuho, Sugai Yuuka, and Moriya Akane participate in the Sakamichi Series joint project, stage play Zambi.
- 21 - The group's first photobook, 21nin no Mikansei is released.
- 29 - The applicants who passed the Sakamichi Joint New Member Recruitment Audition are announced, with 9 members being assigned as Keyakizaka46 2nd Generation and 1 member assigned as Hiragana Keyakizaka46 3rd Generation.
- 22 - Yonetani Nanami graduates from the group.
- 31 - The group performs at the 69th NHK Kouhaku Uta Gassen, marking their 3rd appearance on the program.
- 7 - 17 - Oda Nana, Ishimori Nijika, and Watanabe Rika participate in the second iteration of the Zambi project, stage play Zambi - Theater's End.
- 11 - It was announced that Hiragana Keyakizaka46 would become independent from the group, renaming to Hinatazaka46.
- 27 - Kuroi Hitsuji, Keyakizaka46's 8th single, is released.
- 30 - Nagahama Neru graduates from the group with her own graduation event.
- 31 - The group performs at the 70th NHK Kouhaku Uta Gassen, marking their 4th appearance on the program.
- 16 - Six Sakamichi Kenshusei were assigned to Keyakizaka46.
- 31 - Nagasawa Nanako graduates from the group.
- 16 - During the KEYAKIZAKA46 Live Online, but with YOU! live-streamed concert, captain Sugai Yuuka announced that the group would undergo a rebranding.
- 21 - Dare ga Sono Kane wo Narasu no ka?, Keyakizaka46's last single, is released.
- 4 - Bokutachi no Uso to Shinjitsu: Documentary of Keyakizaka46 is released after being delayed due to the COVID-19 Pandemic.
- 20 - At 8:00PM JST, a surprise announcement was made at Shibuya’s Scramble Crossing which announced that Keyakizaka46 will be renamed as “Sakurazaka46 (櫻坂46).” The official announcement was made on the Keyakizaka46 website the next day.
- 30 - Ishimori Nijika graduates from the group.
- 7 - Eien Yori Nagai Isshun 〜Ano Koro, Tashika ni Sonzaishita Watashitachi〜, Keyakizaka46's "Best" Album, is released.
- 12 & 13 - The group's final concert, Keyakizaka46 THE LAST LIVE is held. Additionally, Sato Shiori graduates from the group.
- 14 - Keyakizaka46 becomes Sakurazaka46.
- 17 - Keyakizaka46 made their final appearance in SONGS (NHK Music Program), performing “Dare ga Sono Kane wo Narasu no ka?” and “Taiyou wa Miageru Hito wo Erabanai”.