I'm having trouble embedding the video of the lead single [m@u], but here it is: https://www.youtube.com/watch?v=5X1pIERBiyY
I was a much bigger fan of her previous band, Midori. They were active between 2003 and 2010, released 5 studio albums, a live album, appeared on several compilation albums. They were described as a twisted version of Judy and Mary. And as much as I love the band, Mariko's school uniform served more as a distraction to their music which was a really interesting pop/punk drums, keyboard, bass combination with Mariko on guitar and vocals.
You can check Mariko on Twitter: https://twitter.com/510mariko
And her web page: http://www.gotomariko.com/