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This page consists of the basic information about all of the members of the group College Cosmos.

List of MembersEdit

Former MembersEdit

School years are from the time the members left or graduated from College Cosmos. (Note: Japanese university graduations typically take place in March.)

Name Birthdate Home
Prefecture
Date Joined School Year
at Time of
Departure
Major Date Left Notes
Nitadori-megumi
Nitadori Megumi
Nitadori Megumi
(似鳥めぐみ)
July 18, 1998
(age 22)
Tokyo October 3, 2018 2nd Year at Keio University Faculty of Letters January 21, 2019
Wakita-mana
Wakita Mana
Wakita Mana
(脇田茉奈)
January 7, 1997
(age 23)
Saitama Graduate of Tokyo University of Science School of Management March 31, 2019 Miss Contest 2015 Finalist
Funada-miko
Funada Miko
Funada Miko
(舩田美子)
November 12, 1996
(age 23)
Ehime Graduate of Aoyama Gakuin University College of Literature
Hashimoto-sana
Hashimoto Sana
Hashimoto Sana
(橋本紗奈)
November 5, 1997
(age 22)
Tokyo 4th Year at Chuo University Faculty of Economics June 30, 2019 Miss Contest 2018 Finalist
Yamaki Risa
(山木梨沙)
October 14, 1997
(age 22)
Tokyo 4th Year at Keio University Faculty of Business and Commerce October 31, 2019 Morning Musume 12ki Member "Mirai Shoujo" Audition finalist,
former member of Hello Pro Kenshuusei (2013-2014),
concurrent Country Girls member (2018-2019)
WakitaRina-ShiawasenoArikawaDochiraDesuka
Wakita Rina
Wakita Rina
(脇田璃奈)
July 31, 1998
(age 22)
Saitama 3rd Year at Tokyo University of Science Department of Business Economics Miss Contest 2018 Grand Prize
ItoMai-ShiawasenoArikawaDochiraDesuka
Ito Mai
Ito Mai
(伊藤舞)
May 2, 1996
(age 24)
N/A Graduate of Tamagawa University Department of Liberal Arts Miss Contest 2016 Grand Prize
Aya-ShiawasenoArikawaDochiraDesuka
Aya
Aya
July 11, 1996
(age 24)
Chiba Graduate of Rissho University Faculty of Economics Miss Contest 2017 Secondary Grand Prize
HiragaSakino-ShiawasenoArikawaDochiraDesuka
Hiraga Sakino
Hiraga Sakino
(平賀咲乃)
March 20, 1997
(age 23)
Tokyo Graduate of Seisen University Department of Japanese Language and Literature Miss Contest 2017 Finalist
SakamotoMisaki-ShiawasenoArikawaDochiraDesuka
Sakamoto Misaki
Sakamoto Misaki
(坂本美咲)
September 12, 1996
(age 23)
Chiba Graduate of Atomi University Faculty of Letters
WatanabeMarin-ShiawasenoArikawaDochiraDesuka
Watanabe Marin
Watanabe Marin
(渡辺磨玲)
October 11, 1996
(age 23)
Tokyo Graduate of Kokushikan University Faculty of Political Science and Economics
FukusawaKyoka-ShiawasenoArikawaDochiraDesuka
Fukusawa Kyoka
Fukusawa Kyoka
(深澤京花)
October 5, 1996
(age 23)
Tokyo Graduate of Senzoku Gakuen College of Music
NiinomiRina-ShiawasenoArikawaDochiraDesuka
Niinomi Rina
Niinomi Rina
(新家利奈)
February 26, 1996
(age 24)
Aichi Graduate of Musashino University Faculty of Human Sciences Miss Contest 2016 Secondary Grand Prize
OkamotoMayuko-ShiawasenoArikawaDochiraDesuka
Okamoto Mayuko
Okamoto Mayuko
(岡本真由子)
September 20, 1995
(age 24)
Hiroshima Graduate of Waseda University School of Human Sciences
AonoNatsuki-ShiawasenoArikawaDochiraDesuka
Aono Natsuki
Aono Natsuki
(蒼乃菜月)
March 29, 1997
(age 23)
Tokyo Graduate of Keio University Faculty of Letters
NakajimaNana-ShiawasenoArikawaDochiraDesuka
Nakajima Nana
Nakajima Nana
(中島菜々)
August 14, 1997
(age 22)
Nagano 4th Year at Tokyo University of Agriculture Faculty of Applied Bio-Science December 13, 2019
MatsuiMari-ShiawasenoArikawaDochiraDesuka
Matsui Mari
Matsui Mari
(松井まり)
October 22, 1996
(age 23)
Tokyo
(raised in Hiroshima)
Graduate of Chuo University Faculty of Law March 31, 2020 Miss Contest 2017 Finalist
TsushimaHaruka-ShiawasenoArikawaDochiraDesuka
Tsushima Haruka
Tsushima Haruka
(對馬桜花)
March 24, 1999
(age 21)
Tokyo 4th Year at Rikkyo University College of Arts
MatsuokaMotoka-ShiawasenoArikawaDochiraDesuka
Matsuoka Motoka
Matsuoka Motoka
(松岡資佳)
December 23, 1997
(age 22)
Tokyo Graduate of Jissen University Faculty of Humanities and Social Sciences
AkizukiKana-ShiawasenoArikawaDochiraDesuka
Akizuki Kana
Akizuki Kana
(秋月香七)
December 3, 1998
(age 21)
Tokyo 4th Year at Keio University Faculty of Letters May 31, 2020
SugaMarin-ShiawasenoArikawaDochiraDesuka
Suga Marin
Suga Marin
(菅真鈴)
November 21, 1997
(age 22)
Hokkaido Graduate of Kokogakuin University Faculty of Economics Miss Contest 2018 Secondary Grand Prize,
former member of PEACEFUL (2011-2012)
ItoAyaka-ShiawasenoArikawaDochiraDesuka
Ito Ayaka
Ito Ayaka
(伊藤彩華)
March 26, 1999
(age 21)
Kanagawa 4th Year at Rikkyo University College of Intercultural Communication
YukishimaMomoha-ShiawasenoArikawaDochiraDesuka
Yukishima Momoha
Yukishima Momoha
(雪嶋桃葉)
September 13, 1998
(age 21)
Tokyo 4th Year at Seijo University Faculty of Arts and Literature
GunjiNao-ShiawasenoArikawaDochiraDesuka
Gunji Nao
Gunji Nao
(郡司奈桜)
April 16, 1998
(age 22)
Fukushima 4th Year at Nihon University College of Art
Natsuki-ShiawasenoArikawaDochiraDesuka
Natsuki
Natsuki
(菜月)
June 25, 1998
(age 22)
Tokyo 4th Year at Japan Women's College of Physical Education Faculty of Physical Education

TenuresEdit

  • Akizuki Kana, Suga Marin, Ito Ayaka, Yukishima Momoha, Gunji Nao, Natsuki: 1 Year, 7 Months, 25 Days
  • Matsui Mari, Tsushima Haruka, Matsuoka Motoka: 1 Year, 5 Months, 29 Days
  • Nakajima Nana: 1 Year, 2 Months, 11 Days
  • Yamaki Risa, Wakita Rina, Ito Mai, Aya, Hiraga Sakino, Sakamoto Misaki, Watanabe Marin, Fukusawa Kyoka, Niinomi Rina, Okamoto Mayuko, Aono Natsuki: 1 Year, 28 Days
  • Hashimoto Sana: 8 Months, 28 Days
  • Wakita Mana, Funada Miko: 5 Months, 29 Days 
  • Nitadori Megumi: 3 Months, 19 Days

Members Single CountEdit

Year Joined Member Debut Single Last Single Single Count
2018 Yamaki Risa Yume wa Ijiwaru /
Kotoba no Mizu wo Roka
Shitai / Kigou Nanka ja nai
Watashitachi wa
Shiawase no Arika
wa Dochira Desu ka /
Watashi Kakumei
2 Singles
Matsui Mari
Akizuki Kana
Suga Marin
Wakita Rina
Ito Mai
Tsushima Haruka
Ito Ayaka
Yukishima Momoha
Gunji Nao
Aya
Hiraga Sakino
Sakamoto Misaki
Watanabe Marin
Fukusawa Kyoka
Matsuoka Motoka
Niinomi Rina
Okamoto Mayuko
Aono Natsuki
Natsuki
Nakajima Nana
Hashimoto Sana Yume wa Ijiwaru /
Kotoba no Mizu wo Roka
Shitai / Kigou Nanka ja nai
Watashitachi wa
1 Single
Nitadori Megumi
Wakita Mana
Funada Miko

Members Line-UpsEdit

Date Member(s) Total Members Age Average Singles Released with Line-up
October 3, 2018
(Formation)
Founding members Yamaki Risa, Matsui Mari, Akizuki Kana, Suga Marin, Hashimoto Sana, Wakita Rina, Ito Mai, Nitadori Megumi, Tsushima Haruka, Ito Ayaka, Yukishima Momoha, Gunji Nao, Aya, Hiraga Sakino, Sakamoto Misaki, Watanabe Marin, Fukusawa Kyoka, Matsuoka Motoka, Niinomi Rina, Wakita Mana, Okamoto Mayuko, Aono Natsuki, Funada Miko, Natsuki, and Nakajima Nana. 25 21.04 Yume wa Ijiwaru / Kotoba no Mizu wo Roka Shitai / Kigou Nanka ja nai Watashitachi wa
January 21, 2019 Nitadori Megumi withdraws. 24 21.083
March 31, 2019 Wakita Mana and Funada Miko graduate. 22 21.272 None
June 30, 2019 Hashimoto Sana graduates. 21 21.429 Shiawase no Arika wa Dochira Desu ka / Watashi Kakumei
October 31, 2019 Yamaki Risa, Wakita Rina, Ito Mai, Aya, Hiraga Sakino, Sakamoto Misaki, Watanabe Marin, Fukusawa Kyoka, Niinomi Rina, Okamoto Mayuko, and Aono Natsuki graduate. 10 21 None
December 13, 2019 Nakajima Nana graduates. 9 21.1 None
March 31, 2020 Matsui Mari, Tsushima Haruka, and Matsuoka Motoka graduate. 6 21.16 None
May 31, 2020 College Cosmos suspends activities. Akizuki Kana, Suga Marin, Ito Ayaka, Yukishima Momoha, Gunji Nao, and Natsuki graduate. 0 None None

External LinksEdit

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