>>44120864Pixiv is where most of the best Japanese art can be found. Search for what you want, make sure to pick the japanese version of whatever tag pops up to actually get results. They kind of tried to make searching by popularity a premium feature, but if you add a number to your search it will filter for posts with that many favorites anyways. Not to mention every image has a a 'people who liked this like these' section at the bottom which is even better.
Otherwise I use Twitter, which sucks. I have an account dedicated to following pokemon art and my feed is 80% text posts, pictures of food, and random game clips (Splatoon 2 basically rendered the account useless for a while). Long term goal is to set up a Discord bot or something that just filters all the text tweets, previously seen stuff, etc. and posts direct links for reasonable browsing since Twitter can't be assed to make their user experience customizable.