赤坂BLITZ
Juniel made her official debut on 29 April 2011 releasing her first Japanese EP titled "Ready Go". She was the opening act for Oh Won-bin's live concert Good For You, which was held at Akasaka Blitz on 26 June 2011. Juniel was later the opening act for F.T. Island's Messenger tour, performing at their Zepp Tokyo concert on 6 July 2011.