Yasuda Kei
Yasuda Kei, April 2019
Legal Name Kozaki Kei (小崎圭)
Nicknames Kei-chan (圭ーちゃん?)
Birth Info
Born December 6, 1980 (1980-12-06) (age 39)
Origin Chiba, Japan
Blood Type A
Zodiac Sign Sagittarius Sagittarius
Height 158.5cm
Professional Info
Genres J-Pop
Occupation Singer, Actress, Musician (vocal, piano, saxphone)
Years Active 1998–present
(22 years)
Agency UP-FRONT AGENCY (1998-2012)
J.P ROOM (2013-present)
Label zetima
Associated Acts Morning Musume, Petitmoni, Kiiro 5, 10-nin Matsuri, Odoru 11, Hello! Project Seikatai, H.P. All Stars, Puripuri Pink, Afternoon Musume, Dream Morning Musume
Morning Musume Info
Joined May 3, 1998
Generation 2nd Generation
Debut Single Summer Night Town
Last Single AS FOR ONE DAY
Graduated May 5, 2003
Time in Group 5 Years, 2 Days
Blog Ameblo-favicon.png Yasuda-kei
Instagram Instagram_logo_2016.svg @keiyasuda1206
Yasuda Kei (保田圭), legal name Kozaki Kei (小崎圭), is a Japanese singer, musician, photographer and actress formerly under Hello! Project as a member and sub-leader of Morning Musume.



Yasuda Kei, May 2017


Yasuda Kei, April 2015


Yasuda Kei, March 2013


Yasuda Kei, 2012

Artist photo (18)

Yasuda Kei, April 2011


Yasuda Kei, February 2009

Yasuda kei

Yasuda Kei, January 2008


Yasuda Kei, 2007


Yasuda Kei, 2006


Yasuda Kei, 2002


Yasuda Kei, 2000


Yasuda Kei, 1999


Yasuda Kei, 1998

Early LifeEdit

Yasuda Kei was born on December 6, 1980 in Futtsu, Chiba Prefecture to a couple whose name are undisclosed. Her parents divorced in April 2012.[1]


In 1998, she, along with Yaguchi Mari and Ichii Sayaka, were chosen to be a part of the second generation of singers to be recruited into Morning Musume.

After the second generation joined, Morning Musume went on to produce one album and three more singles until Fukuda Asuka decided to graduate to further pursue her studies. Yasuda was given almost all of Fukuda's lines in future performances of these early songs. She had also collaborated with other Morning Musume members in special projects during these early days. One of the more notable ones was when she co-wrote and co-sang with Abe Natsumi the song "Sanpo" for a radio contest. It became wildly popular and a petition was circulated to make it an official single, though that never did happen.


Yasuda and Ichii sang a particularly catchy duet known as "Otome no Shinrigaku" for Morning Musume's second album. In response to the popularity, Tsunku decided to group them together with the third generation member, Goto Maki to create Morning Musume subgroup Petitmoni (also known as Pucchimoni) in 2001. Their first single, "Chokotto LOVE", has sold over a million copies since its release date.

She had also collaborated with other Morning Musume members in special projects during these early days. One of the more notable ones was when she co-wrote and co-sang with Natsumi Abe the song "Sanpo" for a radio contest. Kei Yasuda also performed a few self written songs on a radio show. Despite more fans requests for the songs to be released, they never were. They are titled "Nacchi wa nee" and "Dear My Friend", and were sung on air at "MBS Radio".

After Ichii graduated from Morning Musume and Petitmoni, fourth generation member Yoshizawa Hitomi was placed into the subgroup. Yasuda had taken on the role of leader of Petitmoni and the group continued to produce three singles and an album.

After Morning Musume's then-leader Nakazawa Yuko graduated in 2001, Yasuda (who was the oldest member of the group at the time) became a co-leader along with Iida Kaori.


Yasuda graduated in mid-2003, to concentrate on an acting career. At the same time when Morning Musume's 6th generation became full-fledged members. Tsunku commented that this one-time sixteen-member formation will be the largest Morning Musume will ever be. During her graduation concert, Yasuda sang a remixed rock version of "Never Forget", which was also Fukuda's graduation song. Additionally, as a special gift, Tsunku gave Yasuda a CD of her own soloist version of "AS FOR ONE DAY", her last single with Morning Musume. Upon her graduation from the group, she became the first sub-leader of Hello! Project.[2]

Following Yasuda's graduation, Iida was given the title of leader of Morning Musume and Yaguchi was given the title of sub-leader. Petitmoni's leadership was handed over to Yoshizawa, and two members were added (fifth generation Morning Musume member Ogawa Makoto and Coconuts Musume's Ayaka Kimura) and Goto was removed. This new line up of Petitmoni never had another release, but a few of their songs were featured on compilation albums.


Yasuda is still in Hello! Project after graduation and has acted in dramas outside of H!P. Within H!P, she has collaborated with Nakazawa Yuko and other H!P artists on 2 Folk Songs albums, performed and MCed in Abe's first solo concert, sang backup for Goto Maki's single "Daite Yo! Please Go On," and had hosted Morning Musume's weekly TV show Hello! Morning until Ishikawa Rika took that position. Yasuda had participated in the H.P. All Stars single "ALL FOR ONE & ONE FOR ALL!" and the Puripuri Pink shuffle unit. Puripuri Pink was a new type of shuffle unit, since it was the first unit to feature graduated Morning Musume members, who were usually not included in the shuffles.

During a promotional appearance on Utaban in 2004, Yasuda revealed that she has been learning psychology, how to play golf, how to play the flute, and also that she is pursuing a career in the theater.


From January 31 to February 7, Yasuda appeared in the stage play "Shinjuku no Onna" with fellow former Morning Musume member Tsuji Nozomi.[3]

From May 23 to June 17, Yasuda appeared in the stage play "Youkihi no Kanpouyaku".[4]

From August 15-19, Yasuda appeared in the stage play "Chigaimasu Sisters" alongside Ayaka.[5]


From December 4-7, Yasuda appeared in the stage play "Lemon Star" alongside Shibata Ayumi.[6]


From April 23 to May 2, she appeared in the stage play "Mikoto Mannequin" alongside Shibata Ayumi, Noto Arisa, and Miyoshi Erika.[7]

On March 31, 2009, Yasuda graduated from Hello! Project along with the rest of the H!P Elder Club.

On May 25, 2009, she took the photos for the Hello! Pro Eggs photobook that would be sold in June at the Shinjin Kouen ~Nakano STEP~ concert. [3]

On September 21, Kei had to have surgery to remove her tonsils[8]. On her blog she revealed that she has had chronic tonsillitis since the time of her debut and and as a result has gotten fevers since then.[9]

From December 2-6, Yasuda appeared in the stage play "Romantic no Yoroshiku" alongside Yajima Maimi and Nakajima Saki.[10]

After graduating from Hello! Project in 2009, Yasuda has written several songs. The song Kimi ni Todoke was performed at fan club events, and the performance made it to a fan club dvd. It was also released as a digital download.


From July 20-25, Yasuda appeared in the stage play "Boku ni Niai no Karada".[11]

In September of 2010, She joined the unit Afternoon Musume with 7 of her fellow OG members.

From December 22-27, Yasuda appeared in the stage play "Abe Naikaku" alongside Abe Natsumi and Kusumi Koharu.[12] The play is about the prime minister and politics.


On January 28, 2011, It was announced that Yasuda was part of the OG member group Dream Morning Musume and that they will be releasing the groups first album, called "Dorimusu ①", on April 20, 2011.

On April 11, 2011, It was announced that her and two other Dream Morning Musume members Yaguchi Mari and Nakazawa Yuko will be holding casual dinner shows on both Osaka and Tokyo.


Yasuda, Natsuyaki Miyabi, and Sudo Maasa will perform in a comedy play titled B・B ~bumpy buddy~. It will be performed on May 15, 2012.


On February 15, theuflicks channel release the first episode of UF Licks show, where Yasuda, along with Tasaki Asashi, was the host for the episode. At the end of the event, she revealed that she will attend Forest For Rest ~SATOYAMA e Ikou~ SATOYAMA movement in YOKOHAMA on March 2nd and 3rd.

On May 2, it was announced that she will be getting married to Kozaki Yoichi.[13]

On May 29, Yasuda and Kozaki Yoichi registered their marriage and are now legally married.[14]

On August 7, it was announced that Yasuda's father was reported missing.[15] At an event, Yasuda said she hasn't been able to contact him in any way since May and filed a missing persons report with the police department in July. The police are currently searching for the man. 

On October 1, Yasuda was transferred to J.P ROOM alongside Ishikawa Rika and Yoshizawa Hitomi.

On December 14 and 15 Yasuda Kei and Ogawa Makoto hosted a Christmas Dinner show titled Yasuda Kei Ogawa Makoto Christmas Dinner Show 2013


On July 28, Yasuda announced that she was expecting her first child.[16] She gave birth to her son on January 7, 2018.[17]

Personal LifeEdit

Yasuda's given name, "Kei", means square jewel (圭; kei). It's a feminine Japanese given name and surname.


  • Measurements: 30,26,35
  • Assets: Voice, humor
  • Hobbies: Enjoying movies, drawing, organizing photos/photography, and kanji drills
  • Special skills: Playing electronic organ, flute, and saxophone
  • Favorite colors: Red, pink
  • Favorite flowers: Roses, margarets, sunflowers
  • Favorite seasons: Summer because I like the seas and the festivals <3
  • Favorite food: Yakiniku, soft roe, kimchee, nattou/soba, chocolate
  • Disliked food: Shallots, milk, cheesecake
  • Favorite movies: Pulp Fiction, Charlie's Angels, Schindler's List, etc.
  • Favorite words: Going my way, love
  • Favorite song: Sekai ni Hitotsu Dake no Hana
  • Favorite childhood song: "Red Shoes"
  • Favorite Part of Japan: Tokyo
  • Game played when a child: Red Rover.
  • Admirable Japanese person: My mother because she is a really good mom, I hope to be like her when I become a mother someday
  • Image of Japan: A pure one (i.e. Japanese food, kimonos, ect)
  • Best part about being in Morning Musume: I was able to give my best in many ways and meet many people
  • If never part of Morning Musume: I'd be married by now (you get married quick in the country)
  • Message to the world: Reduce the traffic! (in Tokyo mostly)


Uta Doki!
  • Ihoujin (Strange)
  • Ai no memory
  • Tentou Mushi No Samba
  • Oyoge! Taiyakikun
  • Aijin
  • Anata
  • Tori no Uta
  • Sayonara no Mukou Gawa
  • Mirai Yosouzu II
  • Joukyou Monogatari
  • Kazarijanai no yo Namida wa
  • Manatsu no Dekigoto (accompanied by Hirayama Miki)
  • Goodbye My Love (accompanied by Hirayama Miki)
  • Young Man (with Yaguchi Mari)
  • Genki wo Dashite (with Yaguchi Mari)
  • Moshimo Piano ga Hiketanara (accompanied Takayama Gen)
  • Tabi no Yado (accompanied by Takayama Gen)
  • Imouto (accompanied by Takayama Gen)
  • Shiretoko Ryojou (accompanied by Inaba Akira)
  • Wakarete Mo Suki Na Hito (Encore) (accompanied by Horiuchi Takao)
  • Fushigi na Peach Pie (with Abe Natsumi)
  • Ano Subarashii Ai wo Mou Ichido (with Goto Maki accompanied by Sugita Jiro)
  • Shirube Nai Tabi (accompanied by Inaba Akira)
Hello! Days
  • The Rose
Vol.12 (Kemeko no Heya)
  • Never Forget
  • Best Friend
  • Sanpo (with Abe Natsumi)
  • Cutey Honey

Unreleased Songs Edit

Yasuda has written several songs, but none of them have been released on CD. This is a list of songs that have been performed live or on radio:

  • Nacchi wa Nee. (なっちはねぇ。; You See, Nacchi She.) is an R&B breeze pop song written by Yasuda Keiand composed by Tamai Kenji. It was only performed on air on MBS Radio on April 7th, 2001.
  • Dear My Friend is a medium ballad song written by Yasuda Kei and composed by Tamai Kenji. It was only performed on air on MBS Radio on March 30th, 2002. A large fan base held petitions trying to achieve a CD release for it, but that never happened.
  • Happy is a song written by Yaguchi Mari and composed by Yasuda Kei. It was first presented as an original song at the live show Yasuda Kei & Yaguchi Mari Special Live 2010 -Kimi ni Todoke 13nenme e no Kansha!-. The song was arranged by TAKAROT.
  • Mou Ichido ~I miss you~ (もう一度〜I miss you〜; One More Time ~I Miss You~) is a song written and composed by Yasuda Kei. It was first presented as an original song at the live show Yasuda Kei & Yaguchi Mari Special Live 2010 -Kimi ni Todoke 13nenme e no Kansha!!. The song was arranged by TAKAROT.[18]
  • Kimi e no Uta ~Always Love~ (きみへのうた〜Always Love~; A Song to You ~Always Love~) is a song written and composed by Yasuda Kei. It was first presented as an original song during her 2012 birthday live held on December 23rd, 2012.

Discography Participated InEdit

Morning Musume
Dream Morning Musume
Hello! Project

Morning Musume
Kiiro 5
10nin Matsuri
Odoru 11
Hello! Project Seikatai
Puripuri Pink
Ganbarou Nippon Ai wa Katsu Singers
Dream Morning Musume

Afternoon Musume

Morning Musume


Solo PhotobooksEdit

Keiphotobook cover

  1. [2002.03.02] Kei



  • [2014.04.20] Bibusukon - Saikai Musume. No Konkatsu Monogatari -




Morning Cop ~Daite HOLD ON ME!~ DVDPinch RunnerTokkaekko CoverKoinuDannoMonogatari-r

TV ShowsEdit

  • [2000] Morning Musume no Heso
  • [2000] Friday Night wa Onegai! Morning (フライデーナイトはお願い!モーニング)
  • [2000-2007] Hello! Morning
  • [2002-2004] Hello Kids (ハローキッズ)
  • [2002] Bishojo kyoiku II (美少女教育II)
  • [2004] Futarigoto (二人ゴト)
  • [2007] Uta Doki! ~Pop Classics~

TV DramasEdit

New drama

  • [2002] Kochira hon ikegami sho (こちら本池上署)
  • [2002] Mikeneko Holmes no Hanzaigaku Kouza (三毛猫ホームズの犯罪学講座)
  • [2004] Tokio-chichi he no Dengon (トキオ 父への伝言)
  • [2005] Nijyuushi no Hitomi (二十四の瞳)
  • [2006] Shinjuku no haha monogatari (新宿の母物語)
  • [2007] Sousa Ikka - Ken atari han, Takako no manako (捜査一課・見当たり班 鷹子の眼)
  • [2012] Suugaku♥Joshi Gakuen (数学♥女子学園)
  • [2012] Mikkai no yado 9 hoseki no amai wana (密会の宿9 宝石の甘い罠)
  • [2012] Shiawase no jikan (幸せの時間)
  • [2013] Sho kyoto renzoku satsujin jiken x Gekai hatomura shugoro (小京都連続殺人事件×外科医 鳩村周五郎)


B.Bbumpy buddyBokutachiDVDcover

  • [2004] Rashomon ~Onnatachi no Maboroshi~ (羅生門~女たちのまぼろし~)
  • [2006] Natsu no Yoru no Yume (夏ノ夜ノ夢; Shakespeare's "Midsummer Night's Dream")
  • [2006] Otona no Mugicha Dai kyu hai me Kouen "Nemurenaito" (大人の麦茶第九杯目公演「ネムレナイト」)
  • [2006] MAMA LOVES mambo IV
  • [2007] Showa kayo shiata shinjuku no onna (昭和歌謡シアター新宿の女)
  • [2007] Yokihi no kanpoyaku (楊貴妃の漢方薬)
  • [2007] Shinjuku no Onna (新宿の女)
  • [2007] Chigaimasu sisters (ちがいますシスターズ)
  • [2007] COASTER(Coaster) (COASTER(コースター))
  • [2008] Shishi tachi (志士たち)
  • [2008] THE do tsubo!!! (THEどツボッ!!)
  • [2008] Lemon Star (レモンスター)
  • [2009] Mikoto Mannequin (ミコトマネキン)
  • [2009] Every Little Thing '09 (エブリ リトル シング '09)
  • [2009] Romantic ni yoroshiku (ロマンチックにヨロシク)
  • [2010] Momoiro shoten e yokoso (桃色書店へようこそ)
  • [2010] Murder Factory (マーダーファクトリー)
  • [2010] Nemure nu yoru no 1 x 8 requiem ~Naked police academy~ (眠れぬ夜の1×8レクイエム〜ネイキットポリスアカデミー〜)
  • [2010] Boku ni Niai no Karada (僕に似合いの身体)
  • [2010] Ii hi, risutora (いい日、リストラ)
  • [2010] Jinsei wa Show Time! (人生はショータイム!)
  • [2010] Genji monogatari x Oguro Maki songs ~Boku wa jūnihitoe ni koi wo suru~ (源氏物語×大黒摩季songs〜僕は十二単に恋をする〜)
  • [2010] Amakara (あまから)
  • [2010] Abe Naikaku (安倍内閣)
  • [2011] Sarachi 5 (更地5)
  • [2011] Nemureru mori no bijo (眠れる森の美女)
  • [2012] Sarachi 6 (更地6)
  • [2012] B・B~bumpy buddy~
  • [2012] Tabidachi ~Ashoro yori~ (旅立ち〜足寄より〜)
  • [2012] Aoge ba (あおげば)
  • [2013] I.have.a.dream (アイ・ハヴ・ア・ドリーム)
  • [2014] Bokutachi Karen na Shounen Gasshoudan


  • [1998-1999] Morning Musume no onegai MORNING CALL! (モーニング娘。のお願いMORNING CALL!)
  • [1999-2000] Pucchimoni Diver (プッチモニダイバー)
  • [2001-2002] Pucchimoni Driver V3 (プッチモニダイバーV3)
  • [2000-2002; 2009–] Young Town Doyoubi (ヤングタウン土曜日)
  • [2016–2017] HELLO! DRIVE! (HELLO! DRIVE! -ハロドラ-) (Wednesdays)


  • [2013-] UF LICKS


  • [2000] Glico Mousse Pocky
  • [2013] Fuku Pika (フクピカ)


  • Yasuda is skilled in several musical instruments, including the saxophone and the piano.
  • She has made several appearances on TV and in concert accompanying herself or others.
  • On a variety show she mentioned that when she finally would get a solo part of a song, she'd work really hard on that certain part when they would shoot the MV's or whenever they performed the song on variety shows. However, she was very frustrated on how producers would usually center Abe Natsumi on the camera for most of the time even if all of Morning Musume was singing togethor. She says a way that she could get on camera was if she slyly appeared behind Abe when the camera was focused on her. Tsugunaga Momoko noted that she and others who were kouhai's of Morning Musume would analyze these occurrences and implement them when they also appeared on stage.
  • On that same variety show she mentioned that Goto Maki  and Abe Natsumi received many presents and letters during their handshake events however, Yasuda would only get 2 or few.
  • Yasuda wrote a kaeuta (parody song) in 2010, where she complained about wanting to be center for at least one of Morning Musume’s singles, but she never got to be.
  • Yasuda attended Kimitsu Shogyo (Commercial) High School in Futtsu City, Chiba Prefecture, but dropped out to pursue her dreams in the entertainment industry.
  • She worked in a McDonald's restaurant in her hometown, until 1998.
  • She is the third oldest girl to join Morning Musume after its formation and the oldest to join under normal circumstances (Fujimoto Miki of the 6th generation was added to Morning Musume after failing the 4th generation audition and was brought back as a soloist before being added, and 8th generation member Junjun was added after an audition that was not even known by the members of the group themselves.).
  • She was famously known as the "grandma" of Morning Musume, and was the frequent target of jokes from TV hosts and other members.
  • She is best friends with Yaguchi Mari.
  • Had a youkai Yasuda Doll made for her on Utaban.
  • She is the third former Morning Musume member to only graduate from Morning Musume and not Hello! Project. The first being Nakazawa Yuko and the second being Goto Maki.
  • Appears in the TV Drama Suugaku♥Joshi Gakuen together with Iida Kaori as the Devil Sisters.
  • She was the only Morning Musume sub-leader who never became leader. In 2018, Iikubo Haruna became the second former sub-leader to never become leader.
  • She is the last 2nd Generation member to get married.
  • Her son (born on January 7, 2018), shares his birthday with fellow Morning Musume member Ishida Ayumi (January 7, 1997) who was born 21 years prior.
  • When Yasuda was in Morning Musume, she was made fun of for her wink-style.[19]

See AlsoEdit

Honorary TitlesEdit

Honorary titles

Oldest Member of Petitmoni
October 3, 1999 - 2002

Succeeded by


Sub-leader of Morning Musume
April 16, 2001 – May 5, 2003

Succeeded by
Yaguchi Mari

Preceded by
Nakazawa Yuko

Oldest Member of Morning Musume
April 16, 2001 - May 5, 2003

Succeeded by
Iida Kaori


Sub-leader of Hello! Project
May 5, 2003 - March 31, 2009

Succeeded by
Fukumura Mizuki


External LinksEdit

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