JK21

JK21 was an idol group. Their name stands for Japan Kansai 21.

Originally, they contained the trainee group PuchiJK (プチJK). They became Puchikko (プチっ娘) in September 2010. At this point, some members were separately called Kenkyuusei.

In January 2016, the existing group became Osaka team JK21R, and the alternate Tokyo team JK21G was formed. JK21R disbanded on August 31, 2018, but JK21G continued until December 15, 2019, when the only remaining member graduated.

JK21R

 * Hasegawa Hina (長谷川ひな) (Joined October 2014)
 * Kiyama Kanon (木山叶望) (Joined May 2015)
 * Hiyama Mahiro (氷山まひろ) (Joined July 2015)
 * Morimatsu Yuan (森松侑杏) (Joined December 2016)

JK21G

 * Asahina Kirari (朝比奈きらり) (Joined January 2016)

Former Members

 * Mizuno Kanna (水野神菜) (Original Member, Graduated Unknown)
 * Ezaki Yuuki (江咲有姫) (Original Member, Graduated April 2009)
 * Fujikawa Maria (藤川真莉亜) (Original Member, Graduated April 2009)
 * Anzai Taka (安斎仰) (Joined May 2008, Graduated April 2009)
 * Nishimori Aimi (西森愛美) (Original Member, Graduated 2009)
 * Mitsuki Runa (美月瑠菜) (Original Member, Graduated 2009)
 * Shoko (柊子) (Original Member, Graduated July 2009)
 * Morisaki Saaya (森崎さあや) (Joined May 2008, Graduated July 2009)
 * Aihara Kaede (相原楓) (Joined 2009, Graduated August 2009)
 * Taniguchi Sachiyo (谷口紗知代) (Joined May 2008, Graduated November 2009)
 * Suda Kotoko (須田琴子) (Joined 2009, Graduated June 2010)
 * Suzuki Rino (須々木梨乃) (Joined 2009, Graduated 2010)
 * Kawaguchi Arisa (川口有砂) (Original Member, Graduated August 2010)
 * Fujii Miyuki (藤井美由紀) (Joined May 2008, Graduated August 2010)
 * Wakizaka Haruna (脇坂春菜) (Joined 2009, Graduated August 2010)
 * Tsukiwaki Yuumi (月脇夕実) (Joined 2009, Graduated September 2010)
 * Joujima Yukari (城島ゆかり) (Original Member, Graduated June 2012)
 * Matsuda Ayumi (松田歩実) (Joined May 2008, Graduated June 2012)
 * Aoi Misaki (碧みさき) (Joined 2009, Graduated June 2012)
 * Ogasawara Yuuko (小笠原裕子) (Joined 2010, Graduated December 2012)
 * Kawasumi Yui (川澄由依) (Joined May 2013, Graduated September 2013)
 * Takeuchi Akari (竹内星) (Joined January 2012, Graduated January 2014)
 * Miyashige Eri (宮繁恵梨) (Joined July 2012, Graduated June 2014)
 * Arakaki Momona (新垣桃菜) (Joined 2009, Graduated March 2015)
 * Tanaka Rina (田中梨奈) (Joined 2010, Graduated May 2015)
 * Yokomine Rinon (横峰りのん) (Joined May 2013, Graduated July 2015)
 * Yoshida Keika (吉田桂華) (Joined August 2012, Graduated July 2015)
 * Azuma Ayane (東彩音) (Joined February 2014, Graduated December 2015)
 * Maeda Rin (前田鈴) (Joined January 2014, Graduated March 2017)
 * Fujisawa Ryoko (藤澤涼子) (Joined January 2016, Graduated March 2017)
 * Yumiko (友美乃) (Joined January 2016, Graduated January 2018)
 * Non (のん) - JK21G (Joined January 2016, Graduated September 2017)

PuchiJK/Puchikko/Kenkyuusei

 * Nagashima Misaki (長島実咲) (Graduated February 2009)
 * Kawakami Mizuha (川上瑞葉)
 * Jouno Sae (城野紗衣)
 * Matsuo Hanako (松尾華子)
 * Kobayashi Emiri (小林映美里)
 * Aono Asahi (青野あさひ)
 * Akao Tomomi (赤尾智美)
 * Nagata Misaki (永田美紗稀)
 * Tominaga Anri (冨永あんり) (Joined 2010, left January 2011)
 * Yamahara Kokoa (山原ココア)
 * Tsubaki Minami (椿みなみ)
 * Okamoto Azusa (岡本梓)
 * Tanabe Yuzuki (田邉優都紀)
 * Sakurai Momoka (櫻井桃香)
 * Nakata Hikari (中田星)
 * Imazaki Makoto (今崎真琴) (Graduated December 2012)
 * Nishimura Rina (西村梨菜)
 * Ishii Yoshimi (石井芳美)
 * Yamazaki Shizuka (山崎静)
 * Morita Kana (森田夏奈)
 * Fujiwara Minako (藤原三梨子)
 * Nakae Misaki (中江未咲)
 * Asakura Mutsuki (麻倉夢月)
 * Watanabe Norika (渡辺のりか) (Graduated July 2013)
 * Kudo Ruka (工藤瑠架) (Graduated August 2013)
 * Iwaki Manami (岩城愛実)
 * Tsuji Sayaka (辻さやか)
 * Iwaki Manami (岩城愛実)
 * Izumi Nana (井住奈々)
 * Kuroda Natsu (黒田なつ)

Albums

 * [2009.12.23] Chaunen! (ちゃうねん!)
 * [2011.12.14] JK21 Yanen (JK21やねん)
 * [2013.07.30] Lucky Tripper ~Sorezore no Natsu~ (Lucky Tripper ～それぞれの夏～)

Singles

 * [2008.09.10] Hanafubuki Honey Chips (花吹雪ハニーチップス)
 * [2008.11.22] WIN! WIN! Tigers (WIN!WIN! タイガース)
 * [2010.12.15] I Ai KANSAI (I・愛 KANSAI)
 * [2011.04.20] Koi no Kiseki (恋のキセキ)
 * [2011.10.05] Namidame Peace Sign (涙目ピースサイン)
 * [2012.03.21] Nanairo Real (七色リアル)
 * [2014.04.30] Mya / Recipe (みゃー / レシピ)
 * [2014.12.24] After School (アフタースクール)

JK21R Singles

 * [2017.09.12] Chi Chi Pappa (ちーちーぱっぱ)