Aldious is an all-female heavy metal band formed in 2008 by guitarist Yoshi and vocalist Rami in Osaka, Japan. After a few member changes, they released their debut EP Dear Slave the following year and soon after formed their own record label, Bright Star Records. Their first album Deep Exceed (2010) reached the top 15 on the Oricon chart, as did their second Determination (2011). However, founding member Rami announced she was leaving the group in June 2012 for health reasons and new vocalist Re:NO joined Aldious just one month later. They produced their third album District Zero in 2013 and it became their highest-charting release to date, reaching number 7. Their fourth album, 2014's Dazed and Delight, peaked at number 20.