Shiritsu Ebisu Chugaku




Years Active

2009 - present


Tokyo, Japan


DefSTAR Records
Sony Music Japan




03: Rika Mayama
05: Ayaka Yasumoto
07: Mirei Hoshina
10: Hinata Kashiwagi
11: Kaho Kobayashi
12: Riko Nakayama

Former Member

01: Kanon
02: Narumi Uno
07: Hinaki Yano
10: Rio Koike
02: Reina Miyazaki
01: Mizuki
04: Natsu Anno
06: Aika Hirota
08: Hirono Suzuki
09: Rina Matsuno (Deceased)

Ebichu (9 member) color coded clothes

Shiritsu Ebisu Chuugaku (私立恵比寿中学, abbreviated Ebichu (エビ中)) is an idol girl group represented by Stardust Promotion under Entertainment Section 3's 3Bjunior. The group was formed in 2009, with the concept of a group of middle school students and was advertised as being a group with very rough singing and dancing skills. The group is nicknamed King of Gakugeeeekai (King of 学芸会, King of School Play).

Group NotesEdit

The morning bell has rung! We are Shiritsu Ebisu Chuugaku! —Introduction line
(朝のチャイムがなりました! 私立恵比寿中学です!)
  • The group was formed as a quintet on August 4, 2009 from a Japanese leading talent agency Stardust Promotion. Much like its sister group, Momoiro Clover Z, Shiritsu Ebisu Chugaku (Ebichu) was originally started out as a newcomer training program for future actress of Stardust before went into a full fledged idol group in 2010.[1] At present, there are eight members with average age at 15.2.[2]
  • Their debut stage was at the annual Starfest live where they covered two Hello!Project songs, Koi Kana and Hana O Puun.
  • The group performed as back-up dancers for Momoiro Clover Z several times in concerts before their major debut. They also participated in some song collaborations.
  • The group's name is translated to "Ebisu Private Junior High School". As the name suggests, its theme revolves around junior high schools and the group has a nickname of Eien ni Chugakusei (エビ中の永遠に中学生, Middle School Students Forever).[3]. The members are introduced and identified by their student attendance number (出席番号, shusseki bangou) (i.e Student Number #03: Rika Mayama). Thir main costumes are school uniforms and the student numbers are often incorporated on their outfits.[4]
  • In addition, Ebichu's key-figures are referred in a way they are like school staffs: Ryoji Fujishita (Stardust Entertainment Section 3 Managing Director) as the "chairman", Yuichi Fujii (manager) as the "headmaster", Kenichi Maeyamada (main songwriter and music producer) as the "music teacher", Hiroshi Ishizaki (Stardust Music A&R department staff and social media admin) as the "substitute teacher" and Kineo Kondo (script and stage producer) as the "language teacher".[5][6]
  • The group is officially nicknamed King of Gakugeeekai (King of School Play) and its concept was advertised as being a group with very rough singing and dancing skills. Or, more accurately, the group's slogan is "Unarticulated dance and shaky vocals."[5]
  • The group also aims for subculture genre approach instead of idol fans. They are dubbed as Subdol (Subculture Idol). [5]
  • The term for those who left the group or withdrew is referred as "moved schools" (転校, tenkou).[7] A newly joined member is referred as the "transfer student" (転校生, tenkousei).[8] Their event is often called as "lesson" and their fans are called "Ebichu Family".
  • The group's name is derived from Ebisu, Shibuya, a neighborhood where Stardust Promotion has its headquarters.[9]
  • The group is Momoiro Clover Z's little sister and Team Syachihoko's older sister.[10]
  • Ebichu (エビ中) can also means "in a shrimp". A shrimp becomes their representative symbol and mascot and is featured in their logo.
  • Although they are also known for not being color coded, Ebichu has a bit of a color coded system. Sometime their outfits (starting at the 9-member lineup) were colored with blue, green, or pink. Green is for students in the 1st year of either junior high or high school (Ayaka, Rina, Hinata, Aika). Pink is for 2nd year (Mirei, Kaho, Riko, and formerly Natsu, and Hirono), and Blue is for 3rd year (Rika, and formerly Mizuki). Since their major debut, they have implemented individual member colors as well, used frequently in fan goods, color coded lyrics, promotional items, and sometimes their costumes.
  • With the exception of Hinaki Yano, who was from Hyogo, all members are from the Kanto region.


Construction This article is currently in the middle of an expansion or major revamping.

The information contained within it should not be presently considered fully accurate and/or complete.


No. Name Kanji Date of Birth Active Notes
03 Rika Mayama 真山りか December 16, 1996 (1996-12-16) (age 21) Aug.09 - present
05 Ayaka Yasumoto 安本彩花 June 27, 1998 (1998-06-27) (age 20) Oct.09 - present Former Minitia Bears member
07 Mirei Hoshina 星名美怜 November 2, 1997 (1997-11-02) (age 20) May.10 - present
10 Hinata Kashiwagi 柏木ひなた March 29, 1999 (1999-03-29) (age 19) Jan.11 - present
11 Kaho Kobayashi 小林歌穂 June 12, 2000 (2000-06-12) (age 18) Jan.14 - present Former Team Daioh Ika member
12 Riko Nakayama 中山莉子 October 28, 2000 (2000-10-28) (age 17) Jan.14 - present Former Team Daioh Ika member

Former Members (Moved Schools)Edit

No. Name Kanji Date of Birth Active Notes
01 Kanon 奏音 February 7, 1997 (1997-02-07) (age 21) Aug.09 - Feb.10
02 Narumi Uno 宇野愛海 March 19, 1998 (1998-03-19) (age 20) Aug.09 - Jan.11
07 Hinaki Yano 矢野妃菜喜 March 5, 1997 (1997-03-05) (age 21) Feb.10 - Apr.11
10 Rio Koike 小池梨緒 January 18, 1998 (1998-01-18) (age 20) May.10 - Jun.11 Former Minitia Bears member
Currently in Ito Wokashi
02 Reina Miyazaki 宮崎れいな August 24, 1997 (1997-08-24) (age 20) Aug.09 - Dec.11 Former Leader
01 Mizuki 瑞季 February 27, 1997 (1997-02-27) (age 21) Aug.09 - Apr.14
04 Natsu Anno 杏野なつ July 12, 1997 (1997-07-12) (age 21) Oct.09 - Apr.14 Former Minitia Bears member
06 Aika Hirota 廣田あ


January 31, 1999 (age 18) Apr. 10-


08 Hirono Suzuki 鈴木裕乃 March 24, 1998 (1998-03-24) (age 20) May.10 - Apr.14 Former Minitia Bears member


Rina Matsuno 松野莉奈 July 16, 1998 - February 8, 2017 (Aged 18; deceased) May.10 - Feb.17

Former Minitia Bears member

Attendance NumberEdit

The use of attendance number (出席番号, shusseki bangou) is a staple in this group. A member always uses "attendance number xx: (name)" in their introduction line. Each member is assigned to an attendance number since she has joined the group. The new member will be assigned as the last in attendance numbers. As of 2014, there were two instances of attendance number change (出席番号変更, shusseki bangou henkou) to rearrange their vacant number (欠番, ketsuban) after a member left the group.

Right before their major debut, when Reina graduated from the group, the attendance number hasn't been rearranged, thus leaving the numbers #01, #02, #04, #06, #08, & #09 vacant.

Name Original
1st change
June 30, 2010
2nd change
June 14, 2011
Kanon 01 (left) (left) (left)
Mizuki 02 01 01 (left)
Narumi Uno 03 02 (left) (left)
Reina Miyazaki 04 03 02 (left)
Rika Mayama 05 04 03 03
Natsu Anno 06 05 04 (left)
Ayaka Yasumoto 07 06 05 05
Hinaki Yano 08 07 (left) (left)
Aika Hirota 09 08 06 (left)
Mirei Hoshina 10 09 07 07
Rio Koike 11 10 (left) (left)
Hirono Suzuki 12 11 08 (left)
Rina Matsuno 13 12 09 (deceased)
Hinata Kashiwagi 13 - 10 10
Kaho Kobayashi 11 - - 11
Riko Nakayama 12 - - 12


Single and Albums ReleasesEdit

Live Concerts and DVD ReleasesEdit


  • TV Variety Shows
  • TV Dramas
  • TV Commercials
  • Radio



  • Their major debut was on the same date (May 5) with Momoiro Clover Z's major debut. May 5 is also the children day in Japan, which fits to their junior high school theme.
  • Ebichu is the only group in Stardust Promotion to experience the death of a member.
  • The group's name sets the pattern for Stardust idol groups' name that is based on sea animals: ebi (shrimp), syachi (killer whale), tako (octopus) and ika (squid).



External LinksEdit