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Okai Asuna
(おか)() ()()()
Okai Asuna, June 2018
Background Information
Also Known As Assuu (あっすー?)
Born May 14, 1996 (1996-05-14) (age 22)
Origin Saitama, Japan
Blood Type A
Zodiac Sign Taurus Taurus
Genres J-Pop
Occupation Idol, Singer
Years Active 2004-2010
Agency UP-FRONT PROMOTION (2004-2010)
Label zetima (2004-2010)
Associated Acts Hello Pro Egg, Okai Chisato
Hello Pro Egg Information
Generation 1st Generation
Left November 28, 2010

Okai Asuna (岡井明日菜), legal name Yajima Asuna (矢島明日菜), is a former member of the Hello! Project trainee group Hello Pro Egg. She is the younger sister of ℃-ute's Okai Chisato.



Okai Asuna, 2017


Okai Asuna, 2013

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Okai Asuna, January 2013 (with Chisato)


Okai Asuna, March 2010

Early LifeEdit

Okai Asuna was born on May 14, 1996 in Saitama, Japan to Okai Ken and Hitomi. She has an older sister, Okai Chisato, a younger sister, Okai Mion, and two little brothers, Okai Tsubasa and Okai Rimu.


Okai Asuna joined Hello! Project as a member of Hello Pro Egg in June 2004 when she passed the auditions alongside twenty-nine other girls.


From March 14-22, she appeared in the third stage play in the "Kaba" series, "Kaba 3", alongside Melon Kinenbi and Miyoshi Erika.[1]


On November 28, Okai withdrew from Hello! Project.


On August 31, Asuna got married to an ordinary man with the last name Yajima. On October 6, Okai Chisato announced on her blog that Asuna had given birth to her first child.[2]


On June 3, Asuna announced to her Instagram followers that she was 7 months pregnant and due in September. She gave birth to her second child on September 21.[3]


  • Name: Okai Asuna (岡井明日菜)
  • Nickname: Assuu (あっすー), Asunan (あすなん), Asunyaa (あすにゃあ)
  • Birthdate: May 14, 1996 (1996-05-14) (age 22)
  • Birthplace: Tokorozawa, Saitama, Japan
  • Bloodtype: A
  • Height: 156cm
  • Astrological Sign: Taurus
  • Hello! Project Groups:

  • Specialty: Cooking, drawing, can ride 5 laps on a sports ground on a unicycle
  • Dislikes: Insects
  • Favorite Food: Crab and melon
  • Least Favorite Food: Eggplant and cauliflower
  • Looks Up To: Niigaki Risa
  • Aiming for in H!P: Goto Maki



  • [2009] Kaba 3 (かば3)


  • She eats bread for breakfast.
  • Has a habit of referring to herself as "Asuna"
  • Her favorite spot is at the top of her two-floored bed.
  • She sometimes appears in her sister's blog, but because she's no longer in the agency, her face is usually censored.[4]




  1. Official Gekijyo Page
  2. "実は、、、岡井ちゃん" (in Japanese). ℃-ute Official Blog. 2016.10.06
  3. "2018/09/21 PM07:41..." (in Japanese). Okai Asuna Instagram. 2018-09-23.
  4. "date♡ちう千聖" (in Japanese). ℃-ute Official Blog. 2013.01.28.

External LinksEdit