Sometimes I get approached by whisky authors on my IG to help them promote (it's been the publishing companies, to be more accurate) and I'll take an advanced copy to read through before I agree to anything. So you could use social media folks to push it. There are a ton of cosplay and anime related accounts I'm sure you could look at.
(everything I do on IG is whisky so I'd help but anime is for viewing in my book lol. I'm in the middle of season 4 of My hero acadamia right now...)
EDIT:
That whisky instagram if you're curious. I haven't posted a book in a while.