Marina Blue

 (マリーナブルー) was an idol group based in Shiga formed in November 2012. In March 2015 all current members graduated and the group was on hiatus until April when a new lineup joined. They disbanded on January 5, 2020. The group was revived again in August 2021.

They are nicknamed Maribu (マリブー).

Final Lineup

 * Honma Akina (本間秋奈) (Joined January 2014, Graduated March 2015, Re-Joined January 2017)
 * Murakami Shiaka (村上幸歌) (Joined January 2016)
 * Murakami Yuna (村上結南) (Joined April 2018)
 * Shibagaki Sana (柴垣さな) (Joined August 2018)

Former Members

 * Kanbayashi Kana (上林加奈) (Original Member, Left April 2013)
 * Nakajima Saki (中嶋沙季) (Joined July 2013, Left August 2013)
 * Yamamura Ayana (山村綾菜) (Original Member, Graduated September 2013)
 * Kitamura Ayumi (北村あゆみ) (Original Member, Graduated October 2013)
 * Inoue Riko (井上梨瑚) (Joined June 2013, Graduated March 2014)
 * Kitada Ayu (北田愛結) (Original Member, Graduated March 2015)
 * Minami Asuka (南麻寿佳) (Original Member, Graduated March 2015)
 * Yokoyama Chisa (横山千紗) (Joined February 2014 Graduated March 2015)
 * Chiba Marino (千葉万里乃) (Joined April 2015, Graduated October 2015)
 * Okumura Ayaka (奥村彩花) (Joined April 2015, Graduated October 2015)
 * Saka Riona (坂莉緒奈) (Joined September 2015, Left November 2015)
 * Hayashi Misao (林未沙緒) (Joined May 2016, Left June 2016)
 * Uesugi Yuuka (上杉結夏) (Joined September 2015, Graduated July 2016)
 * Azuma Sachie (東幸栄) (Joined September 2015, Graduated January 2017)
 * Shiraishi Neon (白石ねおん) (Joined September 2016, Graduated September 2017)
 * Maruyama Mai (丸山舞) (Joined April 2015, Left April 2015, Re-Joined January 2017, Graduated April 2018)

Singles

 * 1) [2014.12.23] Happy! Cheese! Xmas!
 * 2) [2017.12.20] Lemon Squash Flavor