Hello! Project Wiki
Hello! Project Wiki

Hirose Ayaka (広瀬彩海; birth name: 廣瀬彩海) is a former Japanese idol under Hello! Project as a member and the leader of Kobushi Factory. She was first introduced as a Hello Pro Kenshuusei member on November 29, 2014 at the Hello Pro Kenshuusei Happyoukai 2014 ~11gatsu・12gatsu no Nama Tamago Show!~.

Prior to joining Hello Pro Kenshuusei, she was a member of NICE GIRL Project! Kenshuusei.

On March 30, 2020, Kobushi Factory disbanded, and Hirose Ayaka graduated from Hello! Project.[1] Soon after, she left UP-FRONT PROMOTION.[2] As of late 2020, she has been working freelance as a talent and musical actress.


Hirose Ayaka, January 2021

Hirose Ayaka, March 2020

Hirose Ayaka, October 2019

Hirose Ayaka, April 2019

Hirose Ayaka, August 2018

Hirose Ayaka, March 2018

Hirose Ayaka, December 2017

Hirose Ayaka, June 2017

Hirose Ayaka, November 2016

Hirose Ayaka, July 2016

Hirose Ayaka, February 2016

Hirose Ayaka, September 2015

Hirose Ayaka, March 2015

Hirose Ayaka, January 2015

Early Life[]

Hirose Ayaka was born on August 4, 1999 in Kanagawa, Japan.


On September 19, 2011, Hirose was introduced as a member of NICE GIRL Project! Kenshuusei during the Trainees Collection Vol.2 live at Shibuya Yaneura.[3]

In summer 2012, Hirose participated in the Morning Musume 11ki Member "Suppin Utahime" Audition, but failed to pass the third round.


On November 16, NICE GIRL Project!'s trainee program was abolished. Soon after, Hirose, Hashimoto Nagisa, Horie Kizuki, Ogata Risa, Shimano Momoko, and Inoue Rei were given the opportunity to become members of Hello Pro Kenshuusei, transferring to UP-FRONT PROMOTION and joining Hello! Project. She was formally introduced during the Hello Pro Kenshuusei Happyoukai 2014 ~11gatsu・12gatsu no Nama Tamago Show!~ recital concert on November 29 alongside the former NICE GIRL Project! trainees and three other girls.


On January 2, during the Hello! Project 2015 WINTER ~DANCE MODE!~ concert, it was announced that Hirose would be debuting in a new Hello Pro Kenshuusei unit alongside Hamaura Ayano, Taguchi Natsumi, Ogawa Rena, Nomura Minami, Wada Sakurako, Fujii Rio and Inoue Rei. The group's name was later announced as Kobushi Factory.

On March 8, during Hello Pro Kenshuusei Happyoukai 2015 ~3gatsu no Nama Tamago Show!~, Hirose Ayaka was announced leader of Kobushi Factory.


On August 22, Hirose celebrated her 17th birthday at a fanclub event titled Kobushi Factory Hirose Ayaka Birthday Event 2016, featuring two performances in Tokyo.


On August 15, Hirose celebrated her 18th birthday at a fanclub event titled Kobushi Factory Hirose Ayaka Birthday Event 2017, featuring two performances in Tokyo.


On August 6, she celebrated her 19th birthay at a fanclub event titled Kobushi Factory Hirose Ayaka Birthday Event 2018, which featured two shows at TOKYO FM HALL.


On August 5, Hirose celebrated her 20th birthday at a fanclub event titled Kobushi Factory Hirose Ayaka Birthday Event 2019, featuring two performances at Shinjuku ReNY.


On January 8, it was announced that Kobushi Factory would disband on March 30, 2020 with a concert at Tokyo Dome City Hall. Their final single is set to be released on March 4, 2020. Hirose had been in discussions with the agency about her graduation since early 2019, and after discussions with the group, the other members except Inoue Rei also expressed their desire to pursue a new path. It was eventually decided that the group would disband. Afterwards, Hirose graduated from Hello! Project, and began attending university to study music and songwriting in April 2020.[1]

On March 12, Hirose was to hold a joint fanclub event with Inoue Rei and Ogata Risa titled Kobushi Factory Hirose Ayaka・Inoue Rei & Tsubaki Factory Ogata Risa FC Event 2020 at LANDMARK HALL. However, it was cancelled in consideration of a new policy established by the government to prevent the spread of COVID-19.[4]

On March 30, Kobushi Factory disbanded. Afterwards, Hirose graduated from Hello! Project with the intention of leaving UP-FRONT PROMOTION.[2] Her profile was removed from UP-FRONT PROMOTION's website on April 1, indicating she parted ways with the company.

From September 25 to 27, she appeared in the stage play, Otona Project Dai Sanjuu Dan (Otona Project 第三十弾).[5]

From October 9 to 18, Hirose participated in the event READING LIVE DREAM~2020 in October~.[6]

On November 13, she opened an official YouTube channel.[7]

On December 15, Hirose held her first solo live titled "Hirose Ayaka First LIVE "Saikai -saikai-"". The concert took place in AKIBA Cultures Theater and was broadcasted live on SKY PerfecTV! On-Demand. The concert was limited to 50 SKY PerfecTV! subscribers to watch it presentially, who were selected through lottery on SKY PerfecTV! On-Demand's website.[8][9] In the concert, she also performed her first original song called "Koe no Kagiri".


From March 17th to 21th, Hirose was in the stage play Otona Project's Kotoba no Kotoba.

On May 12, it was announced that Hirose would join the cast of the stage play Psychic Gakuen ~Seishun Chou Nouryoku Batoru~ from May 12th (Wed) through May 16th at the Kokumin Mutual Aid Coop Hall / Space Zero in Tokyo. The play was also performed at the Ishikawa Komatsu Arts Theater Urara on May 22nd and 23rd.[10]


In January, Hirose launched Aya - Aya - LIVE (彩-Aya-LIVE), a series of self-produced live events.[11] the first event, Aya-Aya-LIVE vol.1, was held on February 4 at the Shinjuku Samurai live house in Tokyo.[12]

Personal Life[]

She has a younger sister.[13]

Back in 2012, she had two hamsters named Chime (ちめ) and Yume (夢).[3][14][15]

When Hirose joined NICE GIRL Project! in September 2011, she was a 6th year elementary school student.[3]

When Hirose joined Hello Pro Kenshuusei, she was a first year high school student. On March 12, 2018, she announced that she graduated from high school.[16]

Hirose's given name, Ayaka, means "color" (彩; aya) combined with "sea" (海; ka). Her parents chose "Ayaka" because it was a popular name at the time, and "so she'll become a girl who can give color to even the sea!" was an afterthought.[17]

The following list are notable friendships Hirose Ayaka has acquired:

Here is a list of nicknames that was used to refer to Hirose Ayaka:

  • Ayapan (あやぱん): Official nickname, given her since NICE GIRL Project! Kenshuusei.


  • Hobby: Reading,[14] singing,[14] dance[14]
  • Specialty: Dance,[14] singing,[14] speed-reading, memorization, cartwheels
  • Favorite Sport: Athletics
  • Favorite Food: Bread,[14] pastries, omelets, avocados
  • Favorite Hello! Project songs: "Onaji Jikyuu de Hataraku Tomodachi no Bijin Mama", "Watashi no Kokoro", "Crying"
  • Favorite Morning Musume song: Roman ~MY DEAR BOY~
  • Favorite Non-NICE GIRL Project!/Hello! Project Songs: "Mirai e", "Ikitekoso" by Kiroro.
  • Looks up to: Fukuda Kanon, Sugaya Risako, Ikuta Erina, Hagiwara Mai, Morozuka Kanami, Amuro Namie

  • Discography[]

    Main article: Hirose Ayaka/Discography

    Original Songs[]

    • [2020.12.15] Koe no Kagiri


    Fanclub DVDs[]


    Main article: Hirose Ayaka/Publications

    Joint Photobooks[]




    TV Programs[]



    • [2016–2019] HELLO! DRIVE! (HELLO! DRIVE! -ハロドラ-) (Wednesdays, 2016.09–2017.09; Thursdays, 2017.10–2019.06)

    Music Videos[]


    • She loves dancing,[3] baseball and books.
    • She has been dancing since she was 7 years old.[3]
    • Her favorite place is under her bunk bed.
    • Her favorite thing is to ride roller-coasters.
    • Her favorite book genres are mystery and science fiction.
    • Her favorite baseball players are Takahashi Yoshinobu from the Yomiuri Giants, and Toritani Takashi from the Hanshin Tigers.
    • Her favorite Hello! Project group is ANGERME.
    • Her favorite actors are Takeuchi Yuko, Yoshitaka Yuriko, Kiritani Mirei, Omasa Aya and Fukada Kyoko.
    • Her favorite artists are THE Possible,[14] Canary Club[14] and Amuro Namie[14].
    • She is left handed.
    • Her love for baseball comes from her grandfather, whom she would always watch baseball games on TV with when she was younger.
    • The Yomiuri Giants is her favorite team, but Toritani Takashi from the Hanshin Tigers is her favorite player.
    • She has a habit of buying books at every opportunity, so her room has become like a library. She especially likes mystery novels, particularly from female authors such as Minato Kanae and Miyabe Miyuki.
    • She has a yorkshire terrier.
    • At an event, she introduced herself as being the sexiest in the group. This came to her mind after wearing jeans one time and thinking to herself, "With this, there's no way that I'm not number one." She confesses though that she ranked seventh in a previous ranking, beating out only Taguchi Natsumi (who has a little sister character).
    • She loves My Neighbor Totoro, and as a 4 year old child she had many of the lines memorized.
    • She talks about her experience being a trainee for the now defunct Nice Girl Project, which was produced by Tsunku. Apparently, they would have street lives in Asakusa where they would perform on top of beer cases. However, sometimes only 1 or 2 people would come so some members would cry on stage. Regardless, she is really indebted to Tsunku for a lot of things.
    • According to the Top Yell July 2016 interview, Hirose's role within the group is "Factory Manager for Sexiness".[19]
    • She did classical ballet up to her 6th year of elementary school. She performed as the lead role Clara in The Nutcracker, but after the recital, she quit because she decided to start becoming an idol.[20]

    Honorary Titles[]

    Honorary Titles
    Preceded by
    Leader of Kobushi Factory
    2015 – 2020
    Succeeded by
    Preceded by
    Fujii Rio
    Oldest member of Kobushi Factory
    2017 – 2020
    Succeeded by


    1. 1.0 1.1 "こぶしファクトリー活動終了のお知らせ" (in Japanese). Hello! Project. 2020-01-08.
    2. 2.0 2.1 "今とみんなとこれからを作る♡広瀬彩海" (in Japanese). Kobushi Factory Official Blog. 2020-03-28.
    3. 3.0 3.1 3.2 3.3 3.4 3.5 Hirose Ayaka. "嬉しいことが!!" (in Japanese). NICE GIRL Kenshuusei Official Blog "Trainees Collection". 2012-05-24 (Archived: 2014-12-02).
    4. Hirose Ayaka "今のこぶしにできること♡広瀬彩海" (in Japanese). Kobushi Factory Official Blog. 2020-02-27.
    5. https://twitter.com/ayaka_hirose/status/1298190033665458177?s=21
    6. https://twitter.com/ayaka_hirose/status/1301385297167413248?s=21
    7. https://twitter.com/ayaka_hirose/status/1327186226810523648
    8. "元こぶしファクトリー広瀬彩海が配信ソロライブ開催、50名限定で現地観覧も募集" (in Japanese). natalie. 2020-11-19.
    9. https://note.com/ayaka_hirose/n/n19de9bd3558a
    10. 学園で繰り広げられる超能力者たちの闘い!爆走おとな小学生「サイキック学園~青春超能力バトル~」 (in Japanese) Natalie.mu. 2021.05.12.
    11. 彩-Aya-LIVE (in Japanese).
    12. https://twitter.com/live_samurai/status/1489522104873926659
    13. Hirose Ayaka. "優男と筋肉と陸上と。♡広瀬彩海" (in Japanese). Kobushi Factory Official Blog. 2015-04-03.
    14. 14.0 14.1 14.2 14.3 14.4 14.5 14.6 14.7 14.8 14.9 Hirose Ayaka. "初浅草(*⌒▽⌒*)" (in Japanese). NICE GIRL Kenshuusei Official Blog "Trainees Collection". 2012-05-20 (Archived: 2014-12-02).
    15. Hirose Ayaka. "はじめまして" (in Japanese). NICE GIRL Kenshuusei Official Blog "Trainees Collection". 2011-09-19 (Archived: 2014-12-02).
    16. Hirose Ayaka. "ありがとう!♡広瀬彩海" (in Japanese). Kobushi Factory Official Blog. 2018-03-12.
    17. Pocket Morning. 2016-11-05. (Translation by Ro-kun)
    18. Hirose Ayaka. "サイリウム!!" (in Japanese). NICE GIRL Kenshuusei Official Blog "Trainees Collection". 2012-09-23 (Archived: 2014-12-01).
    19. What do the girls manage in Kobushi Factory? (Top Yell July 2016)
    20. Hirose Ayaka. "過去♡広瀬彩海" (in Japanese). Kobushi Factory Official Blog. 2019-03-22.

    External Links[]