3B junior

3B junior is a research student idol group under Stardust Promotion. The group was formed in November 2014 with the same name as 3B junior, Stardust's under-18 idol training department. The original training program was dedicated to train their female talents under 18 years of age, such as giving them acting lessons. The talents were distributed into models, actresses and idols. As of 2014, 3B junior was reorganized into an independent department that specializes only in the training of idols. The group suspended activities on November 3, 2018.

Final Line-Up

 * Aira (愛来)
 * Ichikawa Yuzuki (市川優月)
 * Uran (うらん)
 * Ohira Hikaru (大平ひかる)
 * Okuzawa Reina (奥澤レイナ)
 * Odagaki Hina (小田垣陽菜)
 * Kurimoto Yuzuki (栗本柚希)
 * Kojima Hana (小島はな)
 * Saito Karin (斎藤夏鈴)
 * Suzuki Moeka (鈴木萌花)
 * Nakahara Sakuya (中原咲耶)
 * Nakamura Yuu (中村優)
 * Nagayama Maari (永山真愛)
 * Hazuki Tomoko (葉月智子)

Former Members

 * Amemiya Kanon (雨宮かのん)
 * Kimino Maika (公野舞華)
 * Tsukamoto Sora (塚本颯来)
 * Hanayama Shiho (華山志歩)
 * Harima Reina (播磨怜奈)
 * Mifuu (澪風)
 * Miyamae Reo (宮前怜央)
 * Mori Aoba (森青葉)
 * Uchiyama Ami (内山あみ)
 * Shiina Ruka (椎名るか)
 * Takai Chiho (高井千帆)
 * Naito Runa (内藤るな)
 * Hirase Misato (平瀬美里)

Sub-Units

 * Okuzawamura
 * Rock A Japonica (Promoted)
 * Hachimitsu Rocket (Promoted)
 * Majestic Seven
 * Leaf Citron
 * Saku-chan to Jiiji

Albums

 * [2016.09.07] 3B junior First Album 2016 (3B junior ファースト・アルバム 2016)

Singles

 * [2015.08.14] Fragile Stars / Yuuki no Silhouette (Fragile Stars/勇気のシルエット)
 * [2016.04.16] STARDUST FANTASIA / Hitotsu Yoroshiku Douzo (STARDUST FANTASIA/ひとつよろしくどうぞ)
 * [2018.10.06] Makezugirai / Battle Royale / Sneaker's Delight (まけずぎらい/バトルロイヤル/Sneaker’s Delight)