Shishido was born in Mexico in 1985 to Japanese parents. She lived there until she was two, later going to Japan for elementary school. Between the ages of 13 and 14, Shishido lived in Argentina. She learned Spanish to use in her daily life, though on returning to Japan forgot it since she had nobody with whom to practice. When she was 14, Shishido was inspired to take up the drums after seeing a live performance on TV. She enjoyed the idea of the drummer being an "unsung hero" of the band, after noticing the camera never focused on the drummer. She was first taught the basics of drumming at 14, by Daniel "Pipi" Piazzolla, a drummer and grandson of tango musician Astor Piazzolla. Shishido started performing with her own vocals at age 20. In 2004, Shishido joined the all-female band The News as their third drummer. 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. During this period, Shishido started to perform in her signature style, performing the drums and singing simultaneously. While in Eddy12, Shishido was scouted by a record company for her to debut as a solo musician. 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. She left The News in 2009, however continued to work with her Eddy12 bandmates who act as producers. She debuted under Imperial Records with the digital single "Day Dream Rider" in May 2012. Since then, Shishido released three physical singles, "Aisuru Kakugo", "Music" and "Kiken na Futari". The latter was used as the opening theme song for the TV Asahi drama Doubles: Futari no Keiji. Shishido released her debut album, Kavkanize, on September 4, 2013. In February 2014, Shishido held her first Japanese tour after the release of her single "Wagamama"/"Miss. Miss Me". In September, it was announced that Shis Watch drama online for free.