Anime soundtracks are possibly some of the best songs that fans have jammed to, especially when they are laced with the emotions of the anime itself. It takes an insane amount of talent and musical genius to write, compose and deliver songs that are to be made into anime OSTs because there are sky-high expectations and part of the success of an anime rides on the OST. If an opening song isn't hyped enough, the excitement for the episode could drop, and if the ending isn't nostalgic enough, one might not want to wait for the next episode. Similarly, even after an anime is over, the OST lives on as the fandom revisits them repeatedly to relive their favorite moments. As such, striking the correct balance is essential. Here are 6 Japanese rock bands that have sung for popular anime OSTs and have become iconic in the anime community for the same!

Stereopony

While the band itself has already disbanded, no one can deny the contribution it had to the anime world. This incredible pop-rock band has sung unforgettable OSTs, ranging from 'Hitohira no Hanabira,' the 17th ending song for 'Bleach' to the path-breaking anime with unbelievable global popularity, 'Mobile Suit Gundam 00' and 'Darker Than Black.'

The Pillows

FLCL or Fooly Cooly is easily one of the most artistic and resonant anime of all time. However, what amplifies the immersiveness of this anime is the soundtrack by The Pillows. The Pillows is an alternative/psychedelic rock band, best known for the FLCL OVA series, that they sang the OST for, but the rest of their discography is equally as impressive. 

Egoist

Egosit's name is inseparable from anime, and every time these two worlds have collided, magic has happened. As a matter of fact, Egoist was formed when songwriter Ryo of Supercell collaborated with vocalist Chelly for the soundtrack of 'Guilty Crown,' and the collaboration turned into a long-term partnership as the duo went on to make music for top-rated anime shows like 'Psycho-Pass' and 'Kabaneri of the Iron Fortress.'

JAM Project

JAM Project stands very literally for Japanese Animation-Song Makers as various artists, all established in their own rights, came together solely to explore and contribute to the anison genre. The supergroup is best known for the theme songs of 'One Punch Man,' 'Garo' and 'The SeoulTaker' and are widely celebrated worldwide for their music. 

FLOW

Finally, no list about anison artists would be complete without the inimitable FLOW. FLOW is the band behind three of arguably the most popular OSTs in the history of anime: 'Hero ~Kibō no Uta~' for 'Dragon Ball Z: Battle of Gods,' 'World End' for 'Code Geass: Lelouch of the Rebellion R2' and 'Sign' for 'Naruto Shippuden,' effectively making them the champions of anison.