Hunting down Sukuna fan art has actually turned into a small rabbit hole for me — I love seeing how different artists interpret his menace and charm from 'Jujutsu Kaisen'. If you’re looking for more explicit material, the usual hubs are the first places I check: Pixiv is probably the biggest single repository for Japanese-style fanart and you can often find R-18 tagged works under the 'Sukuna' or '両面宿儺' tags. Twitter/X is another massive source because many artists post teasers there and link to full, gated works on Pixiv, Gumroad, or Patreon. Tumblr still has pockets of fan communities and hidden blogs that host archived pieces, though the overall volume dropped after policy changes.
DeviantArt and Newgrounds host a lot of Western creators, and HentaiFoundry remains a go-to for explicitly adult illustrations and comics. For community-curated collections, Reddit subreddits dedicated to 'Jujutsu Kaisen' or character-specific subreddits sometimes have pinned galleries or links to artist collections (remember many require you to be 18+ to view). Finally, a lot of creators put exclusive NSFW on Patreon or OnlyFans — if you want high-resolution files and support the artist, that’s a solid route. I always check artist age gates, respect content tags, and try to support creators directly when I can; it makes the whole hunt feel more rewarding for me.