- 1 2011
- 2 2012
- 3 2013
- 4 2014
- 5 2015
- 6 2016
- 7 2017
- 8 2018
- 9 2019
- 10 Gallery
- 1 - HKT48 is officially announced
- 31 - HKT48 auditions start. The final was on July 10.
- 23 - 1st Generation debuts with 21 members: Anai Chihiro, Ueki Nao, Kumazawa Serina, Kodama Haruka, Komori Yui, Shimono Yuki, Sugamoto Yuko, Tanaka Natsumi, Taniguchi Airi, Nakanishi Chiyori, Matsuoka Natsumi, Miyawaki Sakura, Murashige Anna, Motomura Aoi, Moriyasu Madoka, Wakatabe Haruka, Abe Kyoka, Imada Mina, Eto Sayaka, Nakanishi Ayaka, Fukagawa Maiko
- 26 - HKT48 Kenkyuusei Te wo Tsunaginagara Shonichi (Theater debut)
- 2 - HKT48 Kenkyuusei Te wo Tsunaginagara Senshuuraku
- 4 - Team H is formed with 16 girls: Anai Chihiro, Ueki Nao, Kumazawa Serina, Kodama Haruka, Komori Yui, Shimono Yuki, Sugamoto Yuko, Tanaka Natsumi, Taniguchi Airi, Nakanishi Chiyori, Matsuoka Natsumi, Miyawaki Sakura, Murashige Anna, Motomura Aoi, Moriyasu Madoka, Wakatabe Haruka. Anai Chihiro appointed as captain.
- 4 - Shonichi of Team H 1st Stage
- 10 - 2nd Generation audition applications open
- 23 - Kodama Haruka becomes the first HKT48 member to appear in an AKB48 senbatsu. (Manatsu no Sounds Good!)
- 6 - Miyawaki Sakura becomes the first HKT48 member to rank in the Senbatsu Sousenkyo
- 16 - Sashihara Rino is transferred to HKT48, remaining on Team Unknown
- 18 - Team H members Komori Yui, Sugamoto Yuko and Taniguchi Airi and Kenkyuusei Eto Sayaka and Nakanishi Ayaka leave the group
- 24 - Ota Aika is transferred to HKT48 on Team Unknown
- 23 - 2nd Generation debuts with 21 members: Akiyoshi Yuka, Ito Raira, Inoue Yuriya, Iwahana Shino, Ui Mashiro, Ueno Haruka, Umemoto Izumi, Okada Kanna, Okamoto Naoko, Kusaba Manami, Kojina Yui, Goto Izumi, Komada Hiroka, Sakaguchi Riko, Tashima Meru, Tanaka Yuka, Tani Marika, Tomiyoshi Asuka, Tomonaga Mio, Fuchigami Mai, Yamada Marina
- 30 - HKT48 Kenkyuusei Party ga Hajimaru yo Shonichi
- 17 - Senshuuraku of Team H 1st Stage
- 1 - 3rd Generation audition applications open.
- 4 - Melon Juice, HKT48's second single, is released
- 2 - HKT48 Himawarigumi 1st Stage Shonichi
- 5 - HKT48 Kenkyuusei Party ga Hajimaru yo Senshuuraku
- 10 - AKB48 Group Draft Kaigi 2013: Yamamoto Mao is selected for Team H
- 17 - HKT48 Kenkyuusei Nounai Paradise Shonichi
- 11 - Wink wa 3kai is released in AKB48's 36th single "Kimi no Hohoemi wo Yume ni Miru".
- 30 - Abe Kyoka graduates from the group to pursue her dream of becoming a model.
- 11 - HKT48's first tour, HKT48 Kyushu 7 Prefecture Tour ~Kawaii Ko ni wa Tabi wo Saseyo~, starts in Oita
- Team H: Akiyoshi Yuka, Anai Chihiro, Inoue Yuriya, Umemoto Izumi, Okamoto Naoko, Kojina Yui, Kodama Haruka, Komada Hiroka, Sakaguchi Riko, Sashihara Rino, Tashima Meru, Tanaka Natsumi, Nakanishi Chiyori, Matsuoka Natsumi, Yamada Marina, Wakatabe Haruka. Anai Chihiro remains as captain.
- Team KIV (New Team): Imada Mina, Ueki Nao, Okada Kanna, Ota Aika, Kumazawa Serina, Goto Izumi, Shimono Yuki, Tanaka Yuka, Tani Marika, Tomiyoshi Asuka, Tomonaga Mio, Fuchigami Mai, Miyawaki Sakura, Murashige Anna, Motomura Aoi, Moriyasu Madoka. Ota Aika appointed as captain.
- Remaining Kenkyuusei: Kusaba Manami, Fukagawa Maiko, Ui Mashiro, Ueno Haruka, Ito Raira, Iwahana Shino, Aramaki Misaki, Kurihara Sae, Sakamoto Erena, Tanaka Miku, Tsutsui Riko, Hokazono Hazuki, Yabuki Nako, Yamauchi Yuna, Yamashita Emiri
- 19 - Draft member Yamamoto Mao debuts at Kagoshima
- 24 - AKB48 Group Daisokaku Matsuri
- Team H Captain: Anai Chihiro, Co-Captain: Matsuoka Natsumi
- Team KIV Captain: Ota Aika, Co-Captain: Miyawaki Sakura
- Yamamoto Mao promoted from Draft Member on Team H
- Yabuki Nako and Tanaka Miku promoted to Team H
- Kusaba Manami and Fukagawa Maiko promoted to Team KIV
- Team H's Nakanishi Chiyori transferred to AKB48's Team A, Team KIV's Tani Marika transferred to SKE48's Team E
- Kimoto Kanon Kennin member on SKE48's Team E and Team KIV
- Remaining Kenkyuusei: Ui Mashiro, Ueno Haruka, Ito Raira, Iwahana Shino, Aramaki Misaki, Kurihara Sae, Sakamoto Erena, Tsutsui Riko, Hokazono Hazuki, Yamauchi Yuna, Yamashita Emiri
- 12 - Sakura, Minna de Tabeta, HKT48's third single, is released
- 21 - Ui Mashiro and Ueno Haruka promoted to Team H, Ito Raira and Iwahana Shino promoted to Team KIV
- 4 - HKT48 in Saitama Super Arena. Nakanishi Chiyori and Tani Marika's last concert as HKT48 members.
- 17 - Team H 1st Waiting Stage Senshuuraku. Nakanishi Chiyori's last stage with HKT48.
- 21 - HKT48 Kenkyuusei Nounai Paradise Senshuuraku. Tani Marika's last stage with HKT48.
- 23 - Team H 2nd Stage Shonichi
- 29 - HKT48's second tour, HKT48 Kyushu 7 Prefecture Tour ~Kawaii Ko ni wa Motto Tabi wo Saseyo~, starts in Chiba
- 8 - Team KIV 1st Stage Shonichi
- 17 - AKB48 Janken Taikai: Miyawaki Sakura becomes the first HKT48 member picked to center an AKB48 A-side. (Kibouteki Refrain)
- 21 - HKT48's third tour, HKT48 National Tour ~Zenkoku Toitsu Owatoranken~, starts
- 24 - Hikaeme I love you!, HKT48's fourth single, is released.
- 30 - Team H 2nd Stage Senshuuraku
- 09 - Team H 3rd Stage Shonichi
- 7 - HKT48 performs in Taipei, Taiwan
- 17 - HKT48 performs in Hong Kong
- 4 - Otona Ressha is released in AKB48's 39th single Green Flash.
- 26 - Kimoto Kanon's Concurrent Position revoked. (AKB48 Spring Shuffle 2015)
- 8 - HKT48's stage play HKT48 Sashihara Rino Zachou Kouen at Meijiza's Shonichi.
- 22 - 12 Byou, HKT48's fifth single, is released.
- 23 - HKT48's stage play HKT48 Sashihara Rino Zachou Kouen at Meijiza's Senshuuraku.
- 30 - Kusaba Manami graduates to focus on her studies at university
- 10 - AKB48 Group Draft Kaigi 2015: Matsuoka Hana, Murakawa Vivian and Imamura Maria are selected to join Kenkyuusei
- 25 - Kimoto Kanon's last stage with HKT48.
- 27~28 - HKT48's third tour, HKT48 National Tour ~Zenkoku Toitsu Owatoranken~, ends in Yokohama Arena
- 15 - HKT48's stage play HKT48 Sashihara Rino Zachou Kouen at Hakataza Shonichi.
- 31 - HKT48's stage play HKT48 Sashihara Rino Zachou Kouen at Hakataza Senshuuraku.
- 30 - Goto Izumi graduates to focus on her studies.
- 25 - Shekarashika!, HKT48's sixth single, is released.
- 14 - HKT48 Himawarigumi 1st Stage Senshuuraku
- 19 - HKT48 Himawarigumi 2nd Stage Shonichi
- 19 - 4th Generation audition applications open
- 27 - Umemoto Izumi graduates to become a singer-songwriter
- 06 - HKT48's fourth tour, HKT48 Spring Live Tour ~Sashiko du Soleil 2016~ starts in Nagoya.
- 29 - Ito Raira graduates to focus on her studies.
- 09 - Make noise is released in AKB48's 43rd single, Kimi wa Melody.
- 22 - Okada Kanna graduates to focus on her studies.
- 30 - HKT48 Spring Live Tour ~Sashiko du Soleil 2016~ ends in Fukuoka.
- 31 - [Theater in Hawks Town] is closed.
- 13 - 74 Okubun no 1 no Kimi e, HKT48's seventh single is released.
- 28 - [Theater in Nishitetsu Hall] opens.
- 11 - HKT48's fifth tour, HKT48 2016 Summer Hall Tour ~Will HKT break away from the AKB48 Group? Referendum Concerts~ stars in Fukuoka. The tour's title and theme were based on the Brexit referendums.
- This was Anai Chihiro's last concert.
- 12 - 4th Generation debuts with 11 members: Unjo Hirona, Oda Ayaka, Otoshima Risa, Sakai Moeka, Shimizu Rio, Takeda Tomoka, Jitoe Nene, Tsukiashi Amane, Toyonaga Aki, Matsumoto Hinata, Miyazaki Sono
- 21 - Otoshima Risa leaves the group due agency problems, 9 days after her debut.
- 31 - Anai Chihiro graduates.
- 15 - HKT48 2016 Summer Hall Tour ~Will HKT break away from the AKB48 Group? Referendum Concerts~ ends in Oita.
- 07 - Saikou ka yo, HKT48's eighth single, is released.
- 12 - Wakatabe Haruka graduates.
- 15 - Bagutte Iijan, HKT48's nineth single, is released.
- 25 - HKT48's sixth tour, HKT48 Spring Kanto Tour 2017 ~We will show you true idols~, starts in Gunma.
- 10 - Ota Aika graduates.
- 14 - HKT48 Spring Kanto Tour 2017 ~We will show you true idols~, ends in Tokyo.
- 12 - Inoue Yuriya graduates.
- 02 - Kiss wa Matsushikanai no Deshouka?, HKT48's tenth single, is released.
- 1 - Former Kennin member Kimoto Kanon graduates from SKE48's Team E.
- 17 - HKT48 Himawarigumi 3rd Stage Shonichi. This stage started before the 2nd stage had a senshuuraku.
- 27 - 092, HKT48's first album, is released.
- 21 - AKB48 Group 3rd Draft Kaigi
- 23 - Team KIV 2nd Stage Senshuuraku.
- 29 - Team KIV 3rd Stage Shonichi.
- 28 - Tanaka Yuka graduates.
- 20 - Yamada Marina graduates.
- 17 - HKTBINGO! starts airing.
- 31 - Produce 48 final: Miyawaki Sakura and Yabuki Nako are among the winners of the show and form the Korean-Japanese group IZONE. On September 24 it's announced that they'll leave HKT48 and work exclusively in the new group until April 2021.
- 24 - HKT48's 7th Anniversary
- 5th Generation debuts with 14 members: Ishibashi Ibuki, Ichimura Airi, Ogawa Sana, Kamijima Kaede, Kawahira Hijiri, Kudo Haruka, Kuriyama Rina, Goto Hinano, Sakamoto Rino, Takemoto Kurumi, Tanaka Iori, Nagano Miyabi, Mizukami Rimika, Murakami Wakana
- Watanabe Akari and Ito Yueru promoted to Team H
- Baba Sayaka promoted to Team KIV
- Matsuda Yumi and Seki Ai promoted to Team TII
- A new exlcusive HKT48 Theater is announced to open in 2020 just outside of the Fukuoka Yahuoku! Dome, close to where the original theater was built
- 15 - Miyawaki Sakura and Yabuki Nako's last concert with HKT48 until 2021. In fact, they participated as guests members from IZONE.
- 27 - Matsuda Yumi leaves the group without a ceremony, one month after being promoted.
- 28 - Tomiyoshi Asuka graduates.
- 09 - Kodama Haruka graduates without a ceremony, after over a year in hiatus. She signed up with Avex Asnaro Company a few days before leaving the group
- 17 - Komada Hiroka graduates.
- 21 - Iwahana Shino graduates.