「KAMITSUBAKI STUDIO」始まりのバーチャルシンガー。
2018年、当時14歳にしてデビューし、素顔を明かさずに3Dモデリングされたアバターを使って活動を開始。多様な表現が生まれ続ける領域の中でも、唯一無二の歌声と世界観を持つアーティスト像を確立する。
コラボ企画「組曲」での様々なコラボレーションが話題となり、現在YouTube登録者数は100万人、総再生回数は3億回を突破。国内外に熱狂的なファンコミュニティを持つ。
活動初期からのメインコンポーザー・カンザキイオリと生み出した楽曲は高い評価を受け、2022年8月、日本武道館でのワンマンライブ「不可解参(狂)」を開催。
2024年1月には代々木第一体育館で第2章の幕開けともいえる 4th ONE-MAN LIVE「怪歌」を開催。
武道館に続きバーチャルシンガー単独公演として最大規模を更新する初のアリーナ公演を成功させた。

次世代のアーティスト活動のスタンダードとしてバーチャルとリアルの垣根を越えるべく奮闘中。

＜2019年＞
4月、「ニコニコ超会議2019」内で行われた「VTuber Fes Japan 2019」に出演し、異質な存在感が話題となってTwitterトレンド入り。
5月15日に配信限定1st EP「花と心臓」をリリース。収録曲「糸」がiTunesのトップソングチャートのJ-POP3位、総合9位にランクイン。
6月28日公開の映画「ホットギミック ガールミーツボーイ」で初の映画主題歌を「夜が降り止む前に」で担当。
5月、夏に初のワンマンライブを開催することを目的として、クラウドファンディングを実施。目標額500万円に対し、最終的に4,000万円の支援を集め、大きな話題となる。その後、8月1日にLIQUIDROOM（恵比寿）で目標としていたワンマンライブを開催。このワンマンのチケットは即完売、これを受けて当日のライブ全編をYouTube Liveでの生配信、全国各地の映画館、そして世界初となるカラオケルームでのライブビューイングを行い、多くの人がこの出来事を目撃する。ハッシュタグ「#花譜不可解」がTwitterトレンドで世界1位になるなど大成功を収めた。
9月11日には待望の1st Album「観測」を2形態（α / β）でリリース。
12月25日には1st Album「観測」を13人のアーティストがRemixした「観測γ」をリリース。

＜2020年＞
3月23日、ファーストワンマンライブ「不可解」を再構築した「不可解(再)」をZepp DiverCityから無観客配信ライブで開催。Twitterでは「#花譜不可解再」が日本トレンド1位となり大きな話題となった。
4月、TVアニメ「ブラッククローバー」のエンディングテーマに「アンサー」が起用される。
5月、超没入エナジードリンク『ZONe』のIMMERSIVE SONG PROJECTに参加し、コラボ曲「危ノーマル」を制作。
7月、花譜とdocomoがタッグを組んだ、来るべき5Gの時代をイメージした展示イベント「HAYABUSA EXPERIENCE by 3.5D × docomo ONLINE EXHIBITION」がWEB開催され、テーマソング「戸惑いテレパシー」をリリース。
シングルには柊キライ、Orangestar、羽生まゐごの3アーティストによるRemixも収録。
7月9日、Netflixオリジナルアニメ「日本沈没2020」が全世界で配信スタート。新曲「景色」でグランドエンディングテーマを担当し、話題となる。
7月22日、収録曲全でがタイアップ曲となっている2nd EP「花と解答」をリリース。
9月23日、Kizuna AIとのコラボシングル「愛と花」をリリース。楽曲提供には川谷絵音やORESAMAなど豪華クリエイターが参加。
10月10日、2nd ONE-MAN LIVE「不可解弐Q1」をバーチャルライブハウスPANDORAより配信ライブ開催。6万件を超えるツイートにて「#不可解弐Q1」がTwitterのトレンドを再び賑わした。
11月25日、2nd Album「魔法」発売。

＜2021年＞
3月13日に2nd ONE-MAN LIVE「不可解弐Q2」をYouTube Liveにて全編無料配信で開催。同時視聴者数は4万人を超え、Twitterでは「#不可解弐Q2」が10万件を超えるツイートで世界トレンド1位となった。
5月19日、配信シングル「例えば」リリース。
6月4日公開の劇場アニメ「映画大好きポンポさん」の挿入歌を「例えば」で担当。
6月11日12日、2nd ONE-MAN LIVEの集大成「不可解弐REBUILDING」を豊洲PITにて開催。
10月18日、活動3周年を迎え特設サイトの公開や10大プロジェクトの始動が発表された。
10大プロジェクトの第一弾としてリアルアーティストやコンポーザーとのコラボレーション企画「組曲」が始動。

＜2022年＞
3月、花譜高校卒業記念スペシャルライブ「僕らため息ひとつで大人になれるんだ。」開催。
4月、InterFMにて初の冠ラジオ番組「ぱんぱかカフぃ(R)-上京編-」スタート。
8月、世界に影響を与える30歳未満”を30人選出する「Forbes JAPAN 30 UNDER 30 JAPAN 2022」にてエンターテインメント部門を受賞。
8月24日、3rd ONE-MAN LIVE「不可解参(狂)」＠日本武道館開催。
10月、TOKYO MXにて初の冠テレビ番組「バーチャルシンガー花譜の廻れ！MAD TV」が1クール限定で放送。

＜2023年＞
3月、3rd ONE-MAN LIVE「不可解参(想)」をバーチャルライブにて開催。ライブシリーズ「不可解」完結。
同月、3rd Album「狂想」発売。
4月、語学留学のため一時日本を離れる。
6月、花譜の冠ラジオ番組interfm「ぱんぱかカフぃ(R)」とタワーレコードのコラボカフェが大阪・名古屋・東京で開催。
8月、花譜が歌唱を担当したMAISONdes楽曲「トウキョウ・シャンディ・ランデヴ feat.花譜,ツミキ」（テレビアニメ「うる星やつら」2022年第一クールEDテーマ）がストリーミング累計1億回再生突破。

＜2024年＞
1月、4th ONE-MAN LIVE「怪歌」開催。
バーチャルシンガー初となる代々木第一体育館でのアリーナ単独公演を成功させた。
同日、バーチャルシンガー”ソングライター”「廻花」としての活動も発表。
2月、コラボレーション企画「組曲2」始動。第一弾は#KTちゃんとのコラボ曲「ギミギミ逃避行feat.#KTちゃん, prod.peko）。
3月、渋谷BEAMにて「花譜展4」開催。
同月、Remix Album「狂想γ」、コラボレーション企画「組曲」アルバム発売。
4月、2年ぶりに「超音楽祭 in ニコニコ超会議2024」に出演。
6月21日、YouTubeチャンネル登録者数が100万人を達成。
8月「KAMITSUBAKI FES ’24」、9月には理芽とのツーマン企画「Singularity Live vol.3」をTOKYO DOME CITY HALLにて開催。
11月、1月に開催した4th ONE-MAN LIVE「怪歌」のリビルド公演「怪歌(再)」を幕張メッセイベントホールにて開催。
12月には、1年9か月ぶりとなる4th Album「寓話」を発売。

＜2025年＞
4月、花譜展スピンオフ企画KAF POP-UP STORE「花譜ノ新春桜祭-かふあるところに、はるあり。 ほっこり花日和-」をShibuya Sakura Stage SHIBUYA SIDE 4F“404 Not Found”にて開催。
4月スタートのTVアニメ「中禅寺先生物怪講義録　先生が謎を解いてしまうから。」OP主題歌を担当。

Kaf is a Japanese singer-songwriter and virtual YouTuber represented by Kamitsubaki Studio. She is active on YouTube where she uploads original songs as well as covers of J-Pop and Vocaloid songs.

Kaf’s avatar was created by the character designer PALOW., who continues to oversee updates to her costumes and new designs. For her first 3 albums she worked with Vocaloid Producer Iori Kanzaki as the primary composer. In 2021 she started a side project to her solo work entitled “Suite” in which she would work with artists across various genres. In 2022 she became the first VTuber to perform at the Nippon Budokan.

She is also a member of the virtual singer group V.W.P -Virtual Witch Phenomenon- alongside other members of the Kamitsubaki Studio label, Phenomenon Record. She provided the voice model for CeVIO AI Song’s voicebank KAFU, released in July 2021.

2017–2018: discovery and early career

When KAF was 13 years old, around 2017, she would upload cover songs to a karaoke app which caught the attention of Japanese producer Piedpiper. Due to her location and age it took some time for him to connect with her, but their first recording session together surprised the managers and engineers who were present.

Kaf opened her YouTube channel on October 17, 2018, and uploaded her first video (a short clip of her humming the melody to her future release Hinadori (雛鳥, “Chicks”)) on October 18. That December she uploaded her first original song Ito (糸, “Intertwined”) which ranked 3rd in the J-Pop and 9th in the overall charts on ITunes. On December 31 she would make her live performance debut with her participation in the New Year’s Eve VR singing contest event “Count0”. Her performance of Ito (糸, “Intertwined”) as the final act of the event would contribute to a sizable increase in her following.

On February 1, 2019 Kaf announced a temporary hiatus to focus on her high school entrance exams. She ended the hiatus on March 20, 2019 and released the new song Hinadori (雛鳥, “Chicks”).

2019–2022: Fukakai era

On May 15, 2019 she released her first EP, Hana to Shinzō (花と心臓, “Flower & Heart”), followed shortly after with the opening of a Campfire crowdfunding campaign to raise money for her first one-man live. The campaign would raise more than 40 million yen from over 4000 backers, surpassing the 5 million yen goal The concert, titled Fukakai, was held on August 1 at LIQUIDROOM Ebisu and available to watch live at select movie theaters and karaoke shops.

Her song Yoru ga Furiyamu Mae ni (夜が降り止む前に, “Before The Night Falls”) was selected as the theme for the movie Hot Gimmick: Girl Meets Boy, released on June 28, 2019. Kaf’s first full-length album, Kansoku (観測, “Observation”), was released on September 11, 2019. The album was released in 2 formats, designated α and β with their own original artowork and bonus items in special packaging, a trend which would continue for her following albums. A remix album titled Kansoku γ (観測γ, “Observation ɣ”) was released in December featuring contributions from other members of Kamitsubaki Studio and several guest remixers.

On March 14, 2020 Kaf released a YouTube video debuting a new outfit and hairstyle to represent a new period in her career. The follow up to her first one-man live, Fukakai (Re), was held on March 23, 2020 and adjusted to take place in an empty venue while livestreamed on 4 platforms including Niconico Live and YouTube Live for a fee as a result of Covid-19. In April her song Answer (アンサー) was used as the 11th ending theme to the TV anime series Black Clover. That same month she participated in the ZONe Energy IMMERSIVE SONG PROJECT with the song ABnormal (危ノーマル). Both songs would later be released on her 2nd EP and 2nd album.

On July 22, 2020 her 2nd EP, titled Hana to Kaitou (花と解答, “Flower & Answer”), was released. The title for this EP was decided in consultation with her producer, Iori Kanzaki, with the hope that the listener would be able to feel the “answer” in the various meanings of the songs. Kaf stated that during the recording of Flower & Answer she could feel her personal growth as a result of starting voice training, noting that she felt her voice had changed and that she better grasps how to control its tone and resonance. On September 23, 2020 she would release a collaboration song with Kizuna AI titled Karisome (かりそめ, “Transient”) as part of a joint single titled Ai to Hana (愛と花, “Love & Flower”). Her second full-length album, Mahō (魔法, “Magic”), was released on November 25, 2020 with a remix album to follow in December 2021.

Kaf’s 3rd one-man live show, titled Fukakai 2 Q2, was held on March 13, 2021 at the virtual venue PANDORA. This concert was broadcast for free on YouTube Live, and during the show the group V.W.P -Virtual Witch Phenomenon- was announced with Kaf as a member. In May 2021 she provided an insert song for the anime film Pompo: The Cinéphile, titled Tatoeba (例えば, “For Example”).

After a delay due to survey feedback in late 2020, the CeVIO AI voicebank KAFU was released using Kaf as the voice model was released on July 7, 2021. On October 18, 2021 Kaf celebrated her third anniversary. To commemorate the event she announced and started the Kumikyoku (組曲, “Suite”) project on October 27 of the same year. The project was stated to culminate with 15 songs created in collaboration with major label artists from the Japanese music industry, released over an extended period of time.

On March 26, 2022 a special one-man live was held to commemorate her high school graduation. On the same day she announced she would begin hosting her own radio program, titled Panpa ka KAFi R (ぱんぱかカフぃR), which broadcasts on InterFM. On August 24, 2022 Kaf held her 3rd one-man live concert, Fukakai 3 (Mad), at the Nippon Budokan marking the first time a VTuber had performed at the venue. In September 2022 she opened her membership driven YouTube channel, focused on monthly livestreams where she interacts with her fans in real time. In October 2022 the MAISONdes collaboration song Tokyo Shandy Rendezvous feat. Kaf, Tsumiki (トウキョウ・シャンディ・ランデヴ feat. 花譜, ツミキ) was released as the ending theme to the 2022 TV anime series Urusei Yatsura, and would amass more than 100 million plays across streaming services. In 2022 Kaf was also selected as one of Forbes Japan 30 Under 30 in the entertainment category.

2023–present: departure of Iori Kanzaki and expanded activities

On March 8, 2023 Kaf’s 3rd full-length album, Kyoso (狂想, “Crazy For You”), was released. This album would be the final time Iori Kanzaki would act as Kaf’s primary composer. In August she would participate in YouTube Music Weekend alongside other Japanese artists, with promotions featuring her prominently appearing in New York City’s Times Square. On November 1, 2023 an official English language Kaf information X account was launched alongside her first English language interview.

January 3, 2024 marked the end of the Kumikyoku (組曲, “Suite”) series with its 15th release, Ai no Mama (愛のまま, “Still in Love”) with Shigeru Kishida. On January 14, 2024 Kaf held her 4th one-man live “Kaika” as part of the 2-day “Kamitsubaki Yoyogi Wars” event at Yoyogi National Gymnasium. During the event she announced a new singer-songwriter project under the name Kaika and performed the first songs from this project. Her 4th album, being called Guuwa (寓話, “Fable”), was also announced alongside a second series of Kumikyoku (組曲, “Suite”) songs, and the upcoming release of her 3rd remix album, Kyoso γ (狂想γ, “Crazy For You ɣ”).

On February 28, 2024 Kaf kicked off Kumikyoku 2 (組曲 2, “Suite Round 2”) with the new single and music video Gimme Gimme Tōhikō feat. #KTchan (Prod. peko) (ギミギミ逃避行 feat.#KTちゃん(Prod. peko), “Gimi Gimi Flight feat. #KT-chan (Prod. peko)”). On April 24, 2024 the first single from the Kaika project, titled Kaika (かいか), along with a music video that features footage of her performance at Yoyogi National Gymnasium earlier in the year. In May Kaf began a series of weekly English Q&A videos on X called “Kaf’s Worldwide Observations” as a means to communicate with her international fans. Also in May, she released her first new song since the departure of Kanzaki Iori, Gestalt (ゲシュタルト) produced by Kanata Okajima & Jazzin’ Park.

On June 21, 2024 Kaf’s YouTube reached 1 million subscribers, which she celebrated by holding a livestream event to catch the occurrence live while interacting with fans.[46] On August 8, 2024 the first trailer for a new anime series called Kamitsubaki City Under Construction was released, which will feature Kaf’s debut as a voice actor playing a character based on herself. The series is scheduled to release in 2025.

On October 12, 2024 Kaf announced her 4th album Guuwa (寓話, “Fable”) to be released on December 25, 2024. Simultaneously, she announced her first English-language release Answer (English Ver.) self-covering her 2020 release of the same title, releasing on October 23, 2024. On November 3, 2024, Kaf performed a revamped version of her 4th one-man live under the title “Re: Kaika” at Makuhari Messe in Chiba, Japan. During the event, Kaf announced two new releases in the Kumikyoku 2 (組曲 2, “Suite Round 2”) series, collaborating with Hoshimachi Suisei and Moe Shop.