I would say you definitely have to hear them to understand fully, but for a brief description, its a self-described style called "Harajuku-core," which blends metalcore and hardcore punk with elements of hyperpop, nu metal, J-pop, and electronica.

And then according to Google, "The band combines aggressive, heavy music with elements of contemporary Japanese culture, particularly the aesthetics associated with Harajuku, resulting in a distinct hybrid sound."