# Star Planet

Star Planet (stylized as STAR PLANET) (formerly known as STARDUST PLANET) is a department of the Japanese entertainment company Stardust Promotion specialising in female idols. The department's predecessor was named 3B junior, which was active until 2014. From 2014, 3B Junior was reorganized into an independent Idol group, which was active until 2018. The first Stardust Planet Festival (Natsu S) was held on July 27, 2018.

## History
### Stardust Planet
#### Groups

| Group Name | Alias | Formation | Notes |
| Momoiro Clover Z (ももいろクローバーZ) | Momokuro, Momoclo, MCZ | May 17, 2008 | Formerly Known as Momoiro Clover (ももいろクローバー) |
| Shiritsu Ebisu Chugaku (私立恵比寿中学) | Ebichū | August 4, 2009 | Officially shortened to Ebichū (えびちゅう、エビ中) |
| TEAM SHACHI | Shachi | September 11, 2011 | Formerly Known as Team Syachihoko (チームしゃちほこ) |
| Chō Tokimeki Sendenbu (超ときめき♡宣伝部) | Tokisen, Chō Tokisen | April 11, 2015 | Formerly Known Tokimeki Sendenbu (ときめき♡宣伝部) |
| ukka | | May 1, 2015 | Formerly known as Sakura Ebis (桜エビ〜ず) |
| Batten Shōjo Tai (ばってん少女隊) | Basshō | June 21, 2015 | Stylized in English as BATTEN GIRLS |
| Iginari Tohoku San (いぎなり東北産) | Tohokusan | August 9, 2015 | Stylized in English as MADE IN TOHOKU |
| AMEFURASSHI | Amefura | November 3, 2018 | Formerly known as Amefurasshi (アメフラっシ) |
| Namie Joshihatsu Kumiai (浪江女子発組合) | JA Namie | November 24, 2019 | Stylized in English as Joshihatsu Association Namie; JA Namie |
| STAPLA Kenkyusei (スタプラ研究生) | Kenkyusei | April 23, 2022 | Trainee group |

#### Former Groups

| Group Name | Formation | Disbandment |
| 3B junior | November 1, 2014 | November 3, 2018 |
| Rock A Japonica(ロッカジャポニカ) | November 24, 2014 | April 19, 2019 |
| Hachimitsu Rocket (はちみつロケット) | November 24, 2014 | April 26, 2020 |
| Awww! | June 20, 2020 | October 30, 2021 |
| Tacoyaki Rainbow (たこやきレインボー) | September 17, 2012 | March 31, 2022 |
| B.O.L.T | July 15, 2019 | April 15, 2023 |
| CROWN POP | August 8, 2015 | August 8, 2024 |

#### Discography

Releases under the name of Stardust Planet.

##### EP

| Title | Release date | Charts |
| Title | Release date | JP |
| We Are STAR | July 21, 2018 | |

##### Music videos

| Year | Title |
| 2018 | "Wer Are Star" |

### 3B Junior

3B Junior (3Bjunior) was a department of the third section of the Japanese entertainment company Stardust Promotion specialising in training idols. Initially serving as the company's section dedicated to training female talents under the age of 18. Since 2014, however, 3B Junior has been reorganised into an independent department dedicated to idols. Momoiro Clover and Shiritsu Ebisu Chugaku are among popular all-girl idol groups initially founded under the 3B Junior banner.

#### Members

| Name | Birthdate | Sub-Unit | Notes |
| Aira (愛来) | (2002-12-08) December 8, 2002 (age 22) | Okuzawamura | 3b Junior center, member of Gachinko 3 |
| Okuzawa Reina (奥澤レイナ) | (1999-02-16) February 16, 1999 (age 26) | Okuzawamura | 3B Junior Leader |
| Nakamura Yuu (中村優) | (1999-09-15) September 15, 1999 (age 25) | Okuzawamura | |
| Nagayama Maari (永山真愛) | (2002-09-01) September 1, 2002 (age 22) | Okuzawamura | |
| Ichikawa Yuduki (市川優月) | (2003-11-02) November 2, 2003 (age 21) | Majestic 7 | |
| Uran (うらん) | (1999-10-12) October 12, 1999 (age 25) | Majestic 7 | Leader, on indefinite hiatus since January 16, 2017 |
| Ohira Hikaru (大平ひかる) | (2002-07-23) July 23, 2002 (age 22) | Majestic 7 | |
| Odagaki Hina (小田垣陽菜) | (2002-01-30) January 30, 2002 (age 23) | Majestic 7 | |
| Kojima Hana (小島はな) | (2004-02-26) February 26, 2004 (age 21) | Majestic 7 | |
| Saito Karin (斎藤夏鈴) | (2000-10-29) October 29, 2000 (age 24) | Majestic 7 | |
| Suzuki Moeka (鈴木萌花) | (2002-02-05) February 5, 2002 (age 23) | Majestic 7 | Member of Gachinko 3 |
| Kurimoto Yuzuki (栗本柚希) | (2000-10-05) October 5, 2000 (age 24) | Leaf Citron | Member of Gachinko 3 |
| Haduki Tomoko (葉月智子) | (1998-05-12) May 12, 1998 (age 26) | Leaf Citron | Oldest member |
| Nakahara Sakuya (中原咲耶) | (2004-10-01) October 1, 2004 (age 20) | Saku-chan and Jiji | Youngest member |

#### Former members

| Name | Birthdate | Sub-Unit | Notes |
| Miyamae Reo (宮前玲央) | (2001-05-11) May 11, 2001 (age 23) | | |
| Uchiyama Ami (内山あみ) | (2000-01-17) January 17, 2000 (age 25) | Rock A Japonica | Leader |
| Naito Luna (内藤るな) | (2000-12-23) December 23, 2000 (age 24) | Rock A Japonica | |
| Shina Ruka (椎名るか) | (2001-07-28) July 28, 2001 (age 23) | Rock A Japonica | |
| Takai Chiho (高井千帆) | (2001-09-20) September 20, 2001 (age 23) | Rock A Japonica | |
| Hirase Misato (平瀬美里) | (2002-08-06) August 6, 2002 (age 22) | Rock A Japonica | |
| Amemiya Kanon (雨宮かのん) | (1999-09-20) September 20, 1999 (age 25) | Hachimitsu Rocket | Leader, member of Gachinko 3 |
| Tsukamoto Sora(塚本颯来) | (2001-11-07) November 7, 2001 (age 23) | Hachimitsu Rocket | |
| Mifuu (澪風) | (2000-06-01) June 1, 2000 (age 24) | Hachimitsu Rocket | |
| Hanayama Shiho (華山志歩) | (2000-01-24) January 24, 2000 (age 25) | Hachimitsu Rocket | |
| Kimino Maika (公野舞華) | (2001-12-20) December 20, 2001 (age 23) | Hachimitsu Rocket | |
| Harima Reina (播磨怜奈) | (2002-02-13) February 13, 2002 (age 23) | Hachimitsu Rocket | |
| Mori Aoba (森青葉) | (2001-05-12) May 12, 2001 (age 23) | Hachimitsu Rocket | |

#### Musical groups created by 3B Junior
##### Active

* Momoiro Clover Z
    Kanako Momota, Shiori Tamai, Ayaka Sasaki, Reni Takagi
* Shiritsu Ebisu Chugaku
    Rika Mayama, Ayaka Yasumoto, Mirei Hoshina, Hinata Kashiwagi, Kaho Kobayashi, Riko Nakayama
* Team Syachihoko
    Honoka Akimoto, Haruna Sakamoto, Nao Sakura, Yuzuki Ōguro
* Tacoyaki Rainbow
    Saki Kiyoi, Kurumi Hori, Karen Negishi, Mai Haruna, Sakura Ayaki

##### Inactive

* 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

##### Discography

Releases under the name of 3B Junior.

##### Singles

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

##### Albums

| Title | Release date | Charts |
| Title | Release date | JP |
| 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 |

##### 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 an air embolism. She lost consciousness and fell into a coma (which was a result of the air bubbles blocking the flow of blood to the brain), which was a result of inhaling huge quantities of helium as part of a game. The incident was not made public until a week later. The staff of TV Asahi held an emergency press conference in order to announce that the member had been taken to hospital and, though she had not yet recovered consciousness, was showing signs of rehabilitation such as eye movement and mobility of her limbs. Following this, police launched an investigation into the neglected safety measures. The girl has since returned to school, although no statement has been made as to whether after-effects remain.