Kizuna Ai

On 16 January, Kizuna AI's YouTube channel was suspended. It would not be fully restored until 4 February.

On 2 February, she reached 10,000 YouTube subscribers.

On 21 February, Kizuna AI reached 50,000 YouTube subscribers.

On 24 February, Kizuna AI reached 100,000 YouTube subscribers.

On 14 March, the A.I.Games channel was created.

On 17 December, Kizuna AI reached 1 million YouTube subscribers.

Since 2018, Kizuna AI is the host of a TV show for the Japanese Network Nippon TV. She hosted the shows Kizuna AI no BEAT Scramble and Nobangumi. Now she is the face of the show Te Te TV (てぇてぇTV).

On 22 April, Kizuna AI interviewed the controversial Japanese entrepreneur Horie Takafumi (堀江貴文), also known as Horiemon (ホリエモン). Horie, who founded the internet portal Livedoor, was arrested and charged with securities fraud in 2006 and sentenced in 2007. The video was (until the infamous ahegao video) the most disliked video on A.I. Channel.

On 15 July, Kizuna AI released her first original song, "Hello, Morning." On the same day, she reached 2 million YouTube subscribers.

Kizuna AI was the spearhead of Activ8's talent agency upd8 and that agency managed several aspects of Kizuna AI's career, like merchandising and the record of her debut album. After a restructuring of Activ8, it was decided that Kizuna AI will have a full company dedicated to her and she graduated from upd8. Activ8 accumulated 2019 fiscal year losses of approximately US$6.6 million.

Since 27 December 2019, AI is the host of a monthly music magazine called VMZ -Virtual Music ZONe- dedicated to Japanese virtual music performers. It is sponsored by the Japanese energy drink brand ZONe and it also hosts the Top 20 Virtual Music Monthly Ranking issued by the virtual music publication MoguLive.

On 24 April, Japanese voice actress Kasuga Nozomi confirmed long-standing rumors that she provided the voice of Kizuna Ai. Kasuga asked her fans to not conflate her and her career with Kizuna AI. After the restructuring of the A.I. Channel. Kasuga is also an advisor to the new management of the Kizuna AI company.

Activ8, the company behind the production of Kizuna AI's content, announced her graduation from the talent agency upd8 and the formation of a new company in charge of her and her content called Kizuna AI Kabushiki Gaisha (Kizuna AI株式会社). The Kizuna AI incorporated company started activities on 11 May 2020. The Twitter account of Project A.I. was updated and became the official account of the company.

On 8 May, it was announced that Love-chan and Aipii will no longer be part of the main cast of the A.I. Channel. Separate twitter accounts and an independent YouTube channel (called love-pii channel) were created for them.

On 13 October, she posted a video on her YouTube channel announcing her collaboration with online game Super Mecha Champions on 16-17 October 2021. The collaboration has her performing a concert inside the game, where logged in players can have their in-game characters attend the concert physically, where a command unique to her concert allows the characters to dance and cheer for AI while watching her concert. Kizuna AI and Black AI became playable characters in the game. Weapons, vehicles, equipment, and the mecha Firefox all received limited edition skins themed after Kizuna AI.

On 27 November, she posted a music video, titled Kizuna AI & DÉ DÉ MOUSE - Here for you, in relation to the 【SMC×Kizuna AI LIVE 2021】collaboration.

On 4 December, during her fifth anniversary stream, AI announced an indefinite hiatus following her hello, world 2022 concert on 26 February 2022. The break is to "to update future activities with the goal of further developing Kizuna AI". She, along with her team, will continue previously planned but unannounced products into the hiatus. The channel and membership will still be available during the hiatus, but no new videos will be posted. Her social media will remain up, but no new posts will be made except for important announcements.

On 6 December, Kizuna Ai reached 3 million subscribers on YouTube. She was the second to reach this milestone after Gawr Gura on 4 July. Although Kizuna Ai was initially a favorite to reach this milestone first, Gura's rapid rise in popularity saw her overtake Ai's subscriber count on 30 June.

On 26 February, Kizuna Ai starred in Kizuna AI The Last Live “hello, world 2022”. Cameo appearances were made by "over 1000 virtual friends," including stage performances and crowd appearances by numerous VTubers, both independent and from other companies. The event had a peak viewership of over 132,000. The event concluded by debuting "#KZN" ("Kizuna"), a Vocaloid-style voice synthesis character based on Kizuna Ai's voice utilizing CeVIO AI, as well as announcing the production of a Kizuna Ai anime.

Kizuna Ai subsequently went on an indefinite hiatus. According to the video description, she would "go into a sleep period to update her system to better connect with everyone around the world." A message from Kizuna Ai described it as "an end to my never-ending story for the time being." and asked "Please watch over me as I move to my next chapter!"

On the same day, Kizuna AI Inc. official Twitter announced a Kizuna AI Anime project.

On 30 June, a 5th birthday was held by Ai-chan while she was on hiatus. Ai-chan announced that #KZN (now labeled a "Singeroid") would have a limited presale on 8 August.

On 1 August, it was announce that Kizuna AI-related social media accounts would resume their operations. These include: YouTube, TikTok, Instagram, Facebook, bilibili, and Weibo accounts. They also announced that #KZN would be available as CeVIO AI on 8 August 2022.

On 1 December, A.I. Channel celebrated its 6th anniversary, including a message from Kizuna Ai herself. Ai explained that she was still asleep, but had pre-recorded this and other messages for such an occasion.

On 12 February, an announcement stream was held for the XR VTuber unit Alleles Project, featuring fifteen VTubers originating from the Kizuna no Allele anime, hosted by Love-chan. Kizuna Ai appeared in a pre-recorded video, made before hiatus, to congratulate the members.

On 2 April, the TV anime Kizuna no Allele debuted, taking place in an alternate future where after Ai's mysterious disappearance, a group of students at the virtual artist academy AIDEN become friends and make a performing unit called PathTLive. Kizuna AI makes various appearances in the anime with a new 3D outfit. The first episode featured a new song "Linx" by Ai with an accompanying music video. The ending theme, "Yosuga," was done by #KZN.

On 29 March, Kizuna AI Inc. announced the resignation of the project's advisor and former voice talent Kasuga Nozomi, effective 31 March 2024.

On 30 June at midnight JST, Kizuna AI's 8th birthday, her YouTube channel posted a video premiere titled Me in the dream. Over 16,000 viewers arrived ahead of the premiere despite the relatively short notice, with the Twitter account linking the video without context only five hours earlier, its first post since 2022. All of the videos on the channel were set to unlisted prior to the premiere. The video consisted of a blank screen, with a voice-over saying "I'm coming back." The premiere reached over 30,000 viewers at peak.

This was immediately followed by a bizarre ASCII-graphic livestream titled s h e e e e p, which linked a new website, https://cognition.kizunaai.com. That stream briefly reached a peak viewership of over 100,000, amid speculations of the VTuber's return. Kizuna AI producer Tsumugu tweeted that "Kizuna AI's reboot will take at least a few more months," and indicated that the stream represented that Kizuna AI was still sleeping.

During the "s h e e e e p" livestream, Kizuna AI reached 3 million YouTube subscribers for the second time, having originally become the second VTuber to reach the milestone in 2021.

On 1 December, A.I.Channel published a teaser titled "Can you wake up?" with a timer dating to 26 February 2025 at 10 PM JST. The "s h e e e e p" livestream, still ongoing since June, changed graphics to a matching pink style.

On 26 February, A.I.Channel premiered a new official music video titled "KizunaAI「かもね」." After the end of the music video, another video premiere appeared on the channel, titled "I'm Back," scheduled 1 hour later. In the "I'm Back" video, Kizuna Ai debuted a new model, wearing a beige sweater. She stated that she would like to focus first on creating music, aiming for 10 songs within a year, as well as having a concert.

On 1 December, Kizuna Ai celebrated her 9th anniversary with a livestream on A.I. Channel.

On 26 February, she released a new music video titled "KAMACHO" where she's wearing a new costume. Shortly after the MV premier, she livestreamed using a new 3D model with the new costume. The 3D model resembles her original model instead of the more mature model she debuted after her long indefinite hiatus.

* On 30 June 2018, AI celebrated her 2nd birthday with an "in-person" event where a few hundred fans attended to watch her on multiple large screens. Other Virtual YouTubers such as Kaguya Luna, Siro, Mirai Akari, Tokino Sora, Fuji Aoi, Baacharu, Nekomasu, Osanai Mei and the Omega Sisters were invited as well. AI debuted her first single "Hello, Morning" and revealed multiple new outfits. The event was livestreamed on NicoNico and YouTube, although the latter had multiple technical problems, and the archive that was put up was based on the Nico Nico Douga stream.
* AI sings the main theme of the animated movie Laidbackers, the song Precious Piece. Laidbackers was released on 5 April 2019.
* AI debuted her first album called "hello, world" on 15 May 2019. The album included her singles (sans her collaboration song with W&W The Light) and the DVD version included the recording of her live show at the Zepp Osaka Bayside. Her singles were also released separately on CD.
* AI held her first live concerts on the last weekend of 2018 (29 and 30 December). The brief tour was named "hello, world" with two sold out shows on Tokyo and Osaka respectively. The concerts featured all the DJs and musical producers that collaborated with AI in the production of her songs: DÉ DÉ MOUSE, sasakure.UK, Nor, Yunomi, ☆Taku Takahashi, MATZ, TeddyLoid, Yunomi, Avec Avec and Pa's Lam System. AI performed for the first time all her singles live along with the debut of Virtual-san wa Miteiru opening theme "AIAIAI" and a demo version of the song that eventually became the song "The Light" (a collaboration with W&W). The second concert at the Zepp Osaka Bayside was broadcast live on Nico Nico Douga.
* For her 3rd birthday on 30 June 2019, several changes were made to A.I. Channel. The most notable was the introduction of the Four Kizuna AI (4人のキズナアイ yonnin no Kizuna AI). Under the premise that there are four Kizuna AI, these versions started to show different personality traits and one of them became a version for the audience of the People's Republic of China. A channel for the latter was opened on the platform Bilibili. This announcement was received with surprise and bewilderment by several fans. These Kizuna AI received the nicknames of Love-chan, Aipii and Ai-bro (see the A.I. Channel article for more information).
* On August 18 2019, AI was part of the lineup of the Japanese music festival Summer Sonic, marking the first time she was part of a musical festival besides virtual entertainers and interacting with people in the real world.
* On 23 March 2020, one of the Four Kizuna AI, Love-chan, did a livestream on the platform REALITY, along with Kashiko Mari and Fukuya Master.
* On 12 April 2020, Project A.I. (the team in charge of A.I. Channel) announced the cancellation of the celebrations of AI's fourth birthday due to the COVID-19 pandemic. Instead, it was held online.
* On 24 April 2020, AI released her second record, the EP "Replies". Like with her first album, the promo videos for each one of the songs were released, starting with the song The Miracle, released on 26 March 2020.
* On 9 May 2020, AI was invited by the American DJ Porter Robinson to be part of the online music festival Secret Sky.
* On 16 July 2020, it was announced on Compile Heart's Twitter account, that she would make an appearance in the game Neptunia Virtual Stars as a DLC playable VTuber alongside Towa Kiseki.
* On 30 January 2021, Kizuna AI partnered with kaomoji, a brand specializing in Japanese streetwear, leading to the creation of a clothing line. This line featured t-shirts, stickers and hoodies that integrated her virtual persona with kaomoji's distinctive design style.
* During March and May 2021, she had her first virtual US tour, live from Los Angeles in March and New York in May. Special guests for the Los Angeles date included Japanese electronic music producer and DJ TeddyLoid and VShojo VTuber Nyatasha Nyanners. She also had a tie-in DJ set, "CONTACT YOU presented by DJ Kizuna AI" streamed live on Twitch on 27 March and 15 May.
* On 24 September 2021, she held a Virtual Fireworks Concert on Oculus Venues. After the concert, she interacted with fans in Oculus Venues and watched the fireworks show from Kumano City, Mie Prefecture with them. Performing guests included HANABI and DJ TORA. Special guests included Japanese professional cosplayer Enako, and VTubers the Omega Sisters, Tomari Mari, and Nyanners.
* On 20 September 2025, she held the first part of her official comeback concert after her long indefinite hiatus, titled KizunaAI Comeback Concert「Homecoming」DAY1 / hello, again. The first 30 minutes of the concert was streamed live on A.I. Channel for free. Online viewers may pay to watch the full concert through the ABEMALive website links found in her YouTube video (online viewing tickets sale available until 4 October 2025).
* On 21 September 2025, she held the second part of her official comeback concert after her long indefinite hiatus, titled KizunaAI Comeback Concert「Homecoming」DAY2 / new world. The first 30 minutes of the concert was streamed live on A.I. Channel for free. Online viewers may pay to watch the full concert through the ABEMALive website links found in her YouTube video (online viewing tickets sale available until 5 October 2025).
* On 10 January 2026, Fortnite posted the KizunaAI Cup Rules on their official website, collaborating with Kizuna Ai for the competitive event. Kizuna Ai and Fortnite Festival officially announced the collaboration on their respective Twitter accounts the following day, 11 January 2026. She held a livestream sponsored by Epic Games on 24 January 2026, showcasing her own in-game character, as well as original content based on herself.

* hello, world (CD, Digital)(upd8 Music, Avex Trax 2019)

* Hello, Morning EP (12", EP)(Toyokasei, 2019)
* Precious Piece (CD, Single)(Flying Dog, 2019)
* Replies (CD, Digital)(Project A.I., 2020)

* "Hai domo, Kizuna AI desu!"
* "Don't you think "virtual YouTuber" sounds really cool?"
* "This... has turned into a difficult situation."

* A.I.Channel - Main YouTube channel
* A.I.Games - Gaming channel
* KizunaAI - Official Nicovideo user page
* @aichan_nel - Official Twitter Account
* @ProjectAI_ - Kizuna AI Kabushiki Gaisha (previously known as Project A.I.) Official Twitter Account
* kizunaai.com - Official website
* kizunaai.com/music - Official music website
* KizunaAI/キズナアイ - Pixiv profile
* 『A.I.GamersInfo』オープン！ - A.I.Gamers Info
* @a.i.channel_official - Official Instagram Account
* @kizunaai0630 - Official TikTok Profile
* Kizuna AI（official） - Facebook
* Kizuna AI（official） - Official Weibo Profile
* Hello, World tour official website
* Kizuna AI music on Spotify
* aichan_nel - Twitch channel
* cognition.kizunaai.com - Kizuna AI Cognition