[10] On 2 June 2017, the group made its official debut with the single "Aitakatta – Yak Cha Dai Phop Thoe".

[11] The single was officially released on 8 August 2017 and was available for purchase for a limited period of time only, during which it sold 13,500 copies.

[12] The group, representing Japan, performed with Thai singer Palitchoke Ayanaputra and the South Korean band iKON at the concert 2017: 411 Fandom Party in Bangkok, held at Siam Paragon on the night of 30 August 2017, during which it premiered the song "Khukki Siangthai", a cover of AKB48's "Koi Suru Fortune Cookie".

[13][14] On 31 August 2017, an announcement was made saying that due to their violation of undisclosed rules, Jan, Kaew, Orn, and Namneung, the oldest members of the group who were scheduled to perform at the Japan Expo in Thailand 2017 on 1 and 3 September 2017, were demoted to undergirls and replaced by Jane, Mobile, Pupe, and Rina Izuta for the said event.

[15] At the Japan Expo, the group performed "Khukki Siangthai" with World Order during the opening ceremony[16] and unveiled its eponymous anthem, "BNK48 (Bangkok48)", which depicts tourist spots and foods of Bangkok.

[17] The group held its first formal concert, BNK48 We Love You, on 23 September 2017 at The EmQuartier in Bangkok to mark the graduation of Kidcat.

[18] The music video for the song was premiered at the concert BNK48 Mini Live and Handshake, held at J.J Mall in Bangkok on 18 November 2017.

[20][21] At the third handshake event of the group, held at The Mall Ngam Wongwang in Bangkok on 13 and 14 January 2018, additional songs were announced as the B-side tracks for this single, that is, "Namida Surprise!"

[23] It also held a handshake and mini live event outside Bangkok for the first time from 2 to 4 February 2018 at Central Festival Chiang Mai.

Ninety-four of the total candidates passed the initial round on 20 March 2018[26] and twenty-seven of them were finally announced as the second-generation members on 29 April 2018.

But the group's company denied any political purpose behind the meeting, saying the event was just for promoting a government radio station.

[35] On 26 September 2020, Gygee won the BNK48 JANKEN Tournament 2020 – The Senbatsu of Destiny, the group's first event that members will be selected as third album's lineup by rock paper scissors competition.

[42] On 9 April 2023, Angel won the BNK48 JANKEN Tournament 2023 – The Senbatsu of Destiny, becoming the center of the fourth album.

The group formerly performed under the name Lyra, consisted of 6 members who were chosen to be trained by Universal Music Thailand and debuted on October 7, 2020.

[60] According to an explanatory sheet, the company is intended for production of television and online shows and for organisation of events and concerts.

[64] The group has its own digital studio, colloquially known as "Fish Tank" (Thai: ตู้ปลา), at The EmQuartier, where its members periodically make a live appearance on Facebook and YouTube holding discussions on various topics.

[71] The theatre, named "BNK48 the Campus", is located on the fourth floor of The Mall Bang Kapi, occupying a 1,000-m2 area.

[71] A Buddhist housewarming ritual, presided over by nine monks from Wat Traimit Witthayaram, was held for the theatre on 4 July 2018.

On the other hand, the fact that most of the fans are adult men, as opposed to the members who are still teenage girls, is considered an unusual image in the Thai culture.

[76] During the roadshow in the beach town Hua Hin on 6 August 2017, eight autographed photos of members were auctioned off to raise money for flood victims in Northeastern Thailand.