3B Junior

3B Junior (3Bjunior) is the idol training department of the third section of the entertainment company Stardust Promotion. Originally it was the company's section dedicated to training female talents under 18 years of age, such as giving them acting lessons. Since 2014 it was reorganized into an independent department that specializes in idols.[1]

Among the popular all-girl idol groups that were initially founded under the banner of 3B Junior are Momoiro Clover and Shiritsu Ebisu Chugaku.


Name Birthdate Sub-Unit Notes
Aira (愛来) December 8, 2002 (age 16) Okuzawamura 3b Junior center, member of Gachinko 3
Okuzawa Reina (奥澤レイナ) February 16, 1999 (age 19) 3B Junior Leader
Nakamura Yuu (中村優) September 15, 1999 (age 19)
Nagayama Maari (永山真愛) September 1, 2002 (age 16)
Ichikawa Yuzuki (市川優月) November 2, 2003 (age 15) Majestic 7
Uran (うらん) October 12, 1999 (age 19) Leader, on indefinite hiatus since January 16, 2017
Ohira Hikaru (大平ひかる) July 23, 2002 (age 16)
Odagaki Hina (小田垣陽菜) January 30, 2002 (age 16)
Kojima Hana (小島はな) February 26, 2004 (age 14)
Saito Karin (斎藤夏鈴) October 29, 2000 (age 18)
Suzuki Moeka (鈴木萌花) February 5, 2002 (age 16) Member of Gachinko 3
Kurimoto Yuzuki (栗本柚希) October 5, 2000 (age 18) Leaf Citron Member of Gachinko 3
Hazuki Tomoko (葉月智子) May 12, 1998 (age 20) Oldest member
Nahara Sakuya (中原咲耶) October 1, 2004 (age 14) Saku-chan and Jiji Youngest member

Former Members

Name Birthdate Sub-Unit Notes
Uchiyama Ami (内山あみ) January 17, 2000 (age 19) Rock A Japonica Leader
Naito Luna (内藤るな) December 23, 2000 (age 18)
Ruka Shina (椎名るか) July 28, 2001 (age 17)
Takai Chiho (高井千帆) September 20, 2001 (age 17)
Hirase Misato (平瀬美里) August 6, 2002 (age 16)
Amemiya Kanon (雨宮かのん) September 20, 1999 (age 19) Hachimitsu Rocket Leader, member of Gachinko 3
Tsukamoto Sora(塚本颯来) November 7, 2001 (age 17)
Mihuu (澪風) June 1, 2000 (age 18)
Hanayama Shiho (華山志歩) January 24, 2000 (age 18)
Kimino Maika (公野舞華) December 20, 2001 (age 17)
Harima Reina (播磨怜奈) February 13, 2002 (age 16)
Mori Aoba (森青葉) May 12, 2001 (age 17)


Musical groups created by 3B Junior



  • Momonaki
  • Creamy Parfait
  • Kagajo 4S
    Reina Okusawa, Shiori Odagiri, Ari Fujimoto, Ami Uchiyama
  • Minitia Bears
    Karin Saitō, Runa Naitō, Mao Kunimitsu, Meina, Ruka Shiina, Sora Tsukamoto, Chiho Takai, Hina Odagaki, Yukari Kose, Misato Hirase, Maari Takami, Shiori Ishiguro, Aira


Releases under the name of 3B Junior.


Title Release date Charts
"Nanairo no Stardust" (七色のスターダスト) January 1, 2014 2


Title Release date Charts
3-B Jr. Petit Album (3-B Jr.ぷちアルバム) August 30, 2008
Starda Last Daizenshǔ (スタダ 3Bjunior ラスト大全集) January 1, 2014 4

Music videos

Year Title Director
2014 "Nanairo no Stardust" Hideo Kawatani[4]

TV shows

  • 3B Junior Stardust Shoji (3B Juniorの星くず商事) (BS Asahi, 24 January 2015 —)

Helium incident

On February 4, 2015, it was revealed that during the recording of their main TV show 3B Junior Stardust Shoji on January 28, a 12-year-old member (name withheld) of 3B Junior suffered from air embolism, losing consciousness and falling in a coma as a result of air bubbles blocking the flow of blood to the brain, after inhaling huge quantities of helium as part of a game. The incident wasn't made public until a week later.[5][6] The staff of TV Asahi held an emergency press conference to communicate that the member had been taken to the hospital and is showing signs of rehabilitation such as moving eyes and limbs, but her consciousness had not been sufficiently recovered as of yet. Police have launched an investigation due to a neglect of safety measures.[7][8] The girl has since returned to school, although no statement has been made as to whether after-effects remain.[9]


  1. ^ "ももエビしゃち前橋に集結!3Bライブ「俺の藤井」大成功". Natalie (in Japanese). 2014-01-05. Retrieved 2014-02-26.
  2. ^ "3BjuniorのCDシングルランキング" (in Japanese). Oricon. Retrieved 2014-02-26.
  3. ^ "3BjuniorのCDアルバムランキング" (in Japanese). Oricon. Retrieved 2014-02-26.
  4. ^ "Nanairo no Stardust" (in Japanese). Space Shower TV. Retrieved 2015-02-06.
  5. ^ テレ朝事故で分かったヘリウム変声缶の危険性  意識を失うケースの大半が子ども (in Japanese). 2015-02-05. Retrieved 2015-02-05.
  6. ^ "J-Pop Teen Star Left in Coma After Inhaling Helium for TV Stunt". Time. 2015-02-05. Retrieved 2015-02-06.
  7. ^ アイドルが収録中に倒れ病院搬送 テレ朝、ヘリウムガス吸引 (in Japanese). 2015-02-04. Retrieved 2015-02-04.
    テレビ番組収録中、12歳アイドルが意識失い救急搬送 ヘリウムガスが原因か (in Japanese). 2015-02-04. Retrieved 2015-02-04.
    テレ朝謝罪、12歳アイドルがヘリウム吸い救急搬送 (in Japanese). 2015-02-04. Archived from the original on 2015-02-04. Retrieved 2015-02-04.
    "3b Junior idol in coma after inhaling helium on TV Asahi program". 2015-02-04. Retrieved 2015-02-04.
    アイドル救急搬送騒動で制作会社が実績削除の不可解 (in Japanese). 2015-02-04. Retrieved 2015-02-04.
  8. ^ "BBC News - Japanese child star in coma after helium stunt goes wrong". BBC. 2015-02-05. Retrieved 2015-02-06.
  9. ^ "テレ朝事故のアイドル番組終了 少女の容体は回復、通学も". Sankei Shimbun. 2015-03-31. Retrieved 2015-06-01.

External links


3B or 3-B may refer to:

Third baseman

Triple (baseball)

3B Computers, a range of computers produced by AT&T during the 1980s

3B Junior, a department of the Japanese entertainment company Stardust Promotion

3B Lab, a Japanese popular music group

Three Bs,Three well-known musicians

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Hachimitsu Rocket

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Rika Mayama

Rika Mayama (真山 りか, Mayama Rika, born on December 16, 1996) is a Japanese idol singer, a member of the girl idol group Shiritsu Ebisu Chugaku.

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Rock A Japonica

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