[1] The group debuted under Pony Canyon releasing a double A-side single, "Hatsukoi Dash/Aoi Mirai" in January 2009.
[3] In November 2009, the group released their third single "Kanpeki Gū no ne" which was used as the ending theme song for the anime version of the manga Fairy Tail.
In 2011 Natsumi Hirajima announced on the group's official blog that a new single would be released by "Watarirouka Hashiritai 7" on August 3 of that year.
[11][12] On June 25, 2012, Watarirouka Hashiritai 7 took part in Yubi Matsuri, an idol festival produced by Rino Sashihara from AKB48.
[13][14] On August 24, 2012, during the AKB48 in TOKYO DOME ~1830m no Yume~ concert tour members Aika Ota and Haruka Nakagawa were transferred to HKT48 and JKT48 respectively.