The brainchild of Tokyo musicians Jun Sasaki and Kimiko, nano.RIPE have experimented with monster riffs and sweet melodies since forming in 1998. They’ve crafted a hyper-real sound built on math-rock guitar lines and charging rhythms that motor alongside Kimiko’s vibrant and playful vocals. Since their major-label breakthrough in 2010, they’ve become ubiquitous in anime—providing high-energy theme songs for a raft of popular series—and are a sought-after name for those in need of a little zing to perk up their day.