Quite a difficult rule, thanks for the info.You'll need a VPN that comes out in Japan, I don't personally pay for any of the million paid offerings you get ads for since I don't use it enough. I use a free one that I found and manually entered it in my network settings, so now my pc just has a button for it built in.
Additionally this is kinda irritating because to get full quality you have to pay for nico premium. So if anyone has that and wants to use like yt-dlp to get a copy......