# Tatsuya Kitani

Tatsuya Kitani (キタニタツヤ, Kitani Tatsuya, born 28 February 1996) is a Japanese musician, singer, lyricist, composer, and arranger. He is the bassist of the three-member band sajou no hana. He was also active as a Vocaloid producer under the name of "Konnichiwa Tanita-san" (Hello Tanita-san). The affiliated office is Smile Company, and the affiliated label is Mastersix Foundation in Sony Music Records. His official fan club is "Club Unreality".

## Biography
### Band era

When he was in elementary school, he learned about rock from Asian Kung-Fu Generation, and then fell in love with Vola and the Oriental Machine and 8otto. After graduating from junior high school, he bought a bass and formed a cover band for Asian Kung-Fu Generation with his friends. After that, while producing original music with his band, he realized that he was good at composing and went independent. During that time, he became interested in Vocaloid as well.
In October 2011, he formed the band Hitsuji no Mure wa Warawanai (羊の群れは笑わない).
Later he joined the Honeybee Light Music Club. He later formed a three-piece band "humanic", being in charge of bass and vocals; They were active until February 2013.

### As Vocaloid producer, bassist, and composer

In May 2014, Kitani started releasing Vocaloid music under the name "Hello Tanita-san", posting his first song "Kujira to Mercury" using Hatsune Miku on Nico Nico Douga. In July 2016, he released his first full-length album, "He's watching from the ceiling", on The Voc@loi M@ster.
In 2016, he began participating in the live performances of Vocaloid producer n-buna and Takeaki Wada as a support bassist, and as a composer he belongs to Smile Company and other artists. After that, as a support bassist in the band "Yorushika" formed by n-buna in 2017, he had fully participated in recording and live performances from the beginning to the present.

### Turned into a singer and formation of sajou no hana

On 30 March 2017, in commemoration of his Vocaloid song "The Trash Room Sinks into a Rust Color" becoming his first music video to achieve 100,000 views on Nico Nico Douga and being inducted into the site's Hall of Fame, he posted a self-cover under the name Tatsuya Kitani. This was the first time the name Tatsuya Kitani was used in his works, and since then his activities have become prominent as a singer-songwriter.
In the spring of 2018, he graduated from Graduate School of Humanities and Sociology, Faculty of Letters, University of Tokyo and formed the band sajou no hana. The band released their debut single "Hoshie" from Warner Bros. Home Entertainment in August, making a major debut. In the same year, on September 26, he released his first album as a singer-songwriter, "I Do (Not) Love You."
On February 16, 2019, he held his first one-man live, "I Do Love You" at Shimokitazawa Mosaic. 11–19 In the same year, on September 25, the album "Seven Girls' H(e)avens" was released.

### After major debut

On August 26, 2020, he made his major debut. By December he announced that he would release a single for four consecutive months. The singles were "Shiromuku", "Cinnamon", "Tousougeki" and "Ghost".
In 2021, the opening theme for the Fuji Television Idaten-tatsu's OP was released on the first day of the airing and Tite Kubo's manga Bleach original art exhibition "Bleach Ex." Theme song "Rapport", Image song "Thanatophobia" In the same year June 12, under the name of Hello Tanita-san, he released an album "In the margin" containing past works as Vocaloid P.
After entering 2022, the tie-up continued, and the Fuji TV serial drama Gossip theme song "Tsumetai Uzu", "Planets". At the same time Asahi Super Dry x The First Take collaboration project tie-up song "chiharu feat. n-buna" from Yorushika was released. On May 25, he released his second major album "BIPOLAR". After that he made a collaboration with Harumaki Gohan in a song called "Moonlight". On November 23 he released a new EP "Scar" featuring Bleach tie-up songs as "Scar", "Thanatophobia" and "Rapport". On July 7, 2023, he released the lead track "Ao No Sumika" of his EP "Where Our Blue Is", which served as the opening theme song for the first 5 episodes in the second season of the anime Jujutsu Kaisen.

## Discography
### Studio albums

| Title | Album details | Peak chart positions |
| Title | Album details | JPN |
| I Do (Not) Love You. | Released: 26 September 2018 Label: Emo,Alternative&Cool. Formats: CD, digital download | — |
| Seven Girls’ H(e)avens | Released: 25 September 2019 Label: Emo,Alternative&Cool. Formats: CD, digital download | — |
| Demagog | Released: 26 August 2020 Label: Sony Music Records Formats: CD, digital download | 46 |
| Bipolar | Released: 25 May 2022 Label: Sony Music Records Formats: CD, digital download | 23 |
| Roundabout | Released: 10 January 2024 Label: Sony Music Records Formats: CD, digital download | 9 |

### Extended plays

| Title | EP details | Peak chart positions |
| Title | EP details | JPN |
| Scar (スカー) | Released: 23 November 2022 Label: Sony Music Records Formats: CD, digital download | 21 |
| Love: Amplified | Released: 14 June 2023 Label: Sony Music Records Formats: Digital download | — |
| Where Our Blue Is | Released: 19 July 2023 Label: Sony Music Records Formats: CD, digital download | 6 |

### Singles

| Title | Year | Peak chart positions | Peak chart positions | Peak chart positions | Peak chart positions | Peak chart positions | Peak chart positions | Certifications | Album |
| Title | Year | JPN | JPN Cmb. | JPN Hot | TWN | US World | WW | Certifications | Album |
| "Sad Girl" | 2019 | — | — | — | — | — | — | | Seven Girls’ H(e)avens |
| "Club Unreality" (クラブ・アンリアリティ) | 2019 | — | — | — | — | — | — | | Seven Girls’ H(e)avens |
| "Hide and Seek" (ハイドアンドシーク) | 2020 | — | — | — | — | — | — | | Demagog |
| "Bad Dream" (悪夢) | 2020 | — | — | — | — | — | — | | Demagog |
| "Slush" (白無垢) | 2020 | — | — | — | — | — | — | | Non-album single |
| "Cinnamon" | 2021 | — | — | — | — | — | — | | Non-album single |
| "Accomplices" (逃走劇) | 2021 | — | — | — | — | — | — | | Non-album single |
| "Ghost!?" | 2021 | — | — | — | — | — | — | | Non-album single |
| "When the Weak Go Marching In" (聖者の行進) | 2021 | 45 | — | — | — | — | — | | Bipolar |
| "Rapport" | 2021 | — | — | — | — | — | — | | Bipolar |
| "Thanatophobia" (タナトフォビア) | 2021 | — | — | — | — | — | — | | Bipolar |
| "Inner Whirlpool" (冷たい渦) | 2021 | — | — | — | — | — | — | | Bipolar |
| "Two Drifters" (プラネテス) | 2021 | — | — | — | — | — | — | | Bipolar |
| "Chiharu" (ちはる) (featuring N-buna from Yorushika) | 2022 | — | — | — | — | — | — | | Non-album single |
| "Moonlight" (月光) (featuring Harumaki Gohan) | 2022 | — | — | — | — | — | — | | Roundabout |
| "Scar" (スカー) | 2022 | — | — | 93 | — | — | — | | Roundabout |
| "Bakeneko" (化け猫) | 2022 | — | — | — | — | — | — | | Roundabout |
| "Where Our Blue Is" (青のすみか) | 2023 | 6 | 3 | 2 | 15 | 13 | 85 | RIAJ: Gold (dig.) 2× Platinum (st.) | Roundabout |
| "As I Longed for" (憧れのままに) (with Yama) | 2023 | — | — | — | — | — | — | | Awake&Build |
| "Moonthief" | 2023 | — | — | — | — | — | — | | Roundabout |
| "Night Routine" (ナイトルーティーン) | 2023 | — | — | — | — | — | — | | Roundabout |
| "Preview of Me" (次回予告) | 2024 | 37 | — | — | — | — | — | | Non-album single |
| "Always Be with You XD" (ずうっといっしょ) | 2024 | — | — | — | — | — | — | | Non-album single |
| "Fatal" (ファタール) (with Kento Nakajima as Gemn) | 2024 | 5 | 2 | 3 | — | — | — | RIAJ: Gold (st.) | Non-album single |
| "Chained" (いらないもの) (with Natori) | 2024 | 30 | — | 95 | — | — | — | | Non-album single |
| "Whisper" (ウィスパー) | 2024 | — | — | — | — | — | — | | Non-album single |

### "Leaks From His Laptop" demo singles

| Title | Year | Album |
| "Heaven's Turnstiles" (天国の改札) | 2021 | Non-album single |
| "Even As An Adult" (大人になっても) | 2021 | Non-album single |
| "Cute Aggression" (キュートアグレッション) | 2021 | Non-album single |
| "Ode to Joy" (よろこびのうた) | 2021 | Non-album single |