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 NameAliasFormationNotesMomoiro Clover Z (ももいろクローバーZ)Momokuro, Momoclo, MCZMay 17, 2008Formerly Known as Momoiro Clover (ももいろクローバー)Shiritsu Ebisu Chugaku (私立恵比寿中学)EbichūAugust 4, 2009Officially shortened to Ebichū (えびちゅう、エビ中)Chō Tokimeki Sendenbu (超ときめき♡宣伝部)Tokisen, Chō TokisenApril 11, 2015Formerly Known Tokimeki Sendenbu (ときめき♡宣伝部)Batten Shōjo Tai (ばってん少女隊)BasshōJune 21, 2015Stylized in English as BATTEN GIRLSIginari Tohoku San (いぎなり東北産)TohokusanAugust 9, 2015Stylized in English as MADE IN TOHOKURE-GE (リージェ)January 30, 2026Formed through the audition program; HAJIMARE Project.
Former groups Group nameFormationDisbandmentNotes3B juniorNovember 1, 2014November 3, 2018Rock A Japonica(ロッカジャポニカ)November 24, 2014April 19, 2019Hachimitsu Rocket (はちみつロケット)November 24, 2014April 26, 2020Awww!June 20, 2020October 30, 2021Tacoyaki Rainbow (たこやきレインボー)September 17, 2012March 31, 2022B.O.L.TJuly 15, 2019April 15, 2023CROWN POPAugust 8, 2015August 8, 2024TEAM SHACHISeptember 11, 2011December 13, 2025Formerly Known as Team Syachihoko (チームしゃちほこ)AMEFURASSHINovember 3, 2018March 13, 2026Formerly known as Amefurasshi (アメフラっシ)STAPLA Kenkyusei (スタプラ研究生)April 23, 2022March 21, 2026Trainee groupLumiUnion November 24, 2019April 29, 2026Formerly known as JA Namie, Namie Joshihatsu Kumiai (浪江女子発組合)ukkaMay 1, 2015May 24, 2026 Formerly known as Sakura Ebis (桜エビ〜ず)
Timeline
Discography Releases under the name of Stardust Planet.
EP Title Release date Charts JP We Are STAR July 21, 2018
Music videos Year Title 2018 "Wer Are Star"
3B Junior 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 NameBirthdateSub-unitNotesAira (愛来) Okuzawamura3b Junior center, member of Gachinko 3Okuzawa Reina (奥澤レイナ)3B Junior LeaderNakamura Yuu (中村優)Nagayama Maari (永山真愛)Ichikawa Yuduki (市川優月) Majestic 7Uran (うらん)Leader, on indefinite hiatus since January 16, 2017Ohira Hikaru (大平ひかる)Odagaki Hina (小田垣陽菜)Kojima Hana (小島はな)Saito Karin (斎藤夏鈴)Suzuki Moeka (鈴木萌花)Member of Gachinko 3Kurimoto Yuzuki (栗本柚希) Leaf CitronMember of Gachinko 3Haduki Tomoko (葉月智子)Oldest memberNakahara Sakuya (中原咲耶)Saku-chan and JijiYoungest member
Former members NameBirthdateSub-unitNotesMiyamae Reo (宮前玲央)Uchiyama Ami (内山あみ) Rock A JaponicaLeaderNaito Luna (内藤るな)Shina Ruka (椎名るか)Takai Chiho (高井千帆)Hirase Misato (平瀬美里)Amemiya Kanon (雨宮かのん) Hachimitsu RocketLeader, member of Gachinko 3Tsukamoto Sora(塚本颯来)Mifuu (澪風)Hanayama Shiho (華山志歩)Kimino Maika (公野舞華)Harima Reina (播磨怜奈)Mori Aoba (森青葉)
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 JP January 1, 2014 2
Albums Title Release date Charts JP August 30, 2008 — January 1, 2014 4
Music videos Year Title Director 2014 "Nanairo no Stardust" Hideo Kawatani
Television shows (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.
References
External links