Not really a genre, but I wanted to highlight talented artists who release music for free.
CYBERGOTH - Cute Neets Doing Cute Things EP Lovely anime inspired EP.
Splitterkor Rekords Dziwko!!! Many great speedcore albums by Loffciamcore, Diabarha, and others.
Sometimes instrumental music can be boring or feel like it's missing something without vocals. The maximalist sound of J-core avoids this pitfall. I highly recommend the artists below.
T+pazolite
-Makes happy, hyper music with heavy sampling
Camellia
-Prolific composer, a musical genius tbh
gmtn. (witch's slave)
-Dead project, but made fantastic gothic hardcore
Kobaryo
-Makes chaotic and upbeat speedcore music, master of his craft