In September, it was announced that Shishido had switched labels to the newly created Justa Music, a sub-label of Avex Group, and would star in the second series of Erika Sawajiri fashion drama First Class. In February 2014, Shishido held her first Japanese tour after the release of her single 'Wagamama'/'Miss. Shishido released her debut album, Kavkanize, on September 4, 2013. The latter was used as the opening theme song for the TV Asahi drama Doubles: Futari no Keiji.

Since then, Shishido released three physical singles, 'Aisuru Kakugo', 'Music' and 'Kiken na Futari'. She debuted under Imperial Records with the digital single 'Day Dream Rider' in May 2012. She left The News in 2009, however continued to work with her Eddy12 bandmates who act as producers. She was scouted before she started performing the drums as part of her act, but added them back in during discussions for how to set her apart from other musicians. While in Eddy12, Shishido was scouted by a record company for her to debut as a solo musician.

During this period, Shishido started to perform in her signature style, performing the drums and singing simultaneously. In 2005, Shishido started collaborating with The High-Lows' drummer Kenji Ohshima and Uverworld producer Satoru Hiraide, and made a band called Eddy12 (stylized as eddy12) together. In 2004, Shishido joined the all-female band The News as their third drummer. Shishido started performing with her own vocals at age 20. She was first taught the basics of drumming at 14, by Daniel 'Pipi' Piazzolla, a drummer and grandson of tango musician Astor Piazzolla. She enjoyed the idea of the drummer being an 'unsung hero' of the band, after noticing the camera never focused on the drummer. When she was 14, Shishido was inspired to take up the drums after seeing a live performance on TV.

She learned Spanish to use in her daily life, though on returning to Japan forgot it since she had nobody with whom to practice. Between the ages of 13 and 14, Shishido lived in Argentina. She lived there until she was two, later going to Japan for elementary school. Shishido was born in Mexico in 1985 to Japanese parents.

Shishido kavka wagamama miss flac