ecosystem is a Japanese band formed in Osaka. Their alternative and progressive rock swallowed all genres sound with real lyrics, everyday cut and fit the melody mixed with a unique blend. They were an indie band, releasing Jean mini album in 2010, until went major with the single Dilemma in November 2011 that was also the opening theme for the anime Gintama. Official website : http://www.ecosystem-web.net/ Official MySpace: http://www.myspace.com/ecosystemusic/