Just to be clear, this is a site that aggregates Japanese resources, related to both learning and entertainment, in which people can suggest different resources and then vote on the ones they prefer? Because that’s not clear at all from your post alone
Looking good (on desktop as well)! I like the idea too.
You should probably try to populate it a bit more beforehand, though.
For books, you can just google stuff like ラノベ おすすめ 一覧 (light novel recommendation list) and grab the top 10 or something?
Also, maybe remove that comment on the Wanikani app page:
Looks good, I think? It’s hard for me to truly tell as there isn’t much material on the site yet, but the structure at least seems pretty intuitive and the design isn’t an in-your-face style. A rather intriguing idea, I’m interested in seeing how it turns out