Heavy Rocks is the fourth studio album by Japanese band Boris. Alternate takes of "1970" and "Wareruraido" were used for a single, while re-recordings of "Korosu" and "1970" with Michio Kurihara appear on Variations. It has never been released on vinyl, one of very few releases in the band's catalogue with this exclusivity.
Music videos were shot for the tracks "1970" and "Korosu" and were originally viewable on FoodUnited's website, however, this has been discontinued. Both videos were later included on the 2003 DVD, Live at Shimokitazawa Shelter.