So glad I could help! I found the site one day by searching a lot for indie Japanese games since I like to play them. The site's easy to sign up with, I suggest using a browser plugin to translate it unless you use Microsoft Edge like I do which comes built with it.
You're one of my fav creators on this site so I jumped at seeing the email I got about the Japanese release. I really think you're underrated, and I'd love to see more people learn about your games.
If you need help with signing up, I do have this article which can help. I don't cover how to submit a game though, so I can't really help with that unfortunately. I don't use this account for my blog which is why the name is different.