Heavy Rocks is the fourth album by Japanese metal band Boris. Unlike the previous albums, which were laden with doom and drone sounds, this music departs wholesale from Boris's previous efforts and emphasizes punk and stoner rock. Despite this, the album was and is still well received by fans, and is the "base sound" for their releases on Diwphalanx. Music videos were shot for "1970" and "Korosu", both of which formerly could be viewed on FoodUnited's website. Both videos can be found on the DVD Live at Shimokitazawa Shelter. Heavy Rocks was going to be released on vinyl by Man's Ruin Records but the label folded before it happened. A single was released by Inoxia Records featuring alternate takes of the songs "1970" b/w "Wareruraido." Alternate takes of "Korosu" and "1970" appear on Variations. In 2011, Boris released another album called Heavy Rocks featuring the same cover style in purple.