Japanese movies I cannot find anywhere on the web. Is buying a dvd nowadays still a good idea?

Hi everyone, I have lately started to enjoy japanese cinema a lot (from high quality movies like Suna No Onna, Tokyo Nagaremono to more simple stuff like Godzilla va Biollante). The thing is lot of the movies in my watchlist cannot be found anywhere on streaming services like amazon prime or similar. Not even on torrents… For instance i can’t find titles like Mamiya Kyoday (2006), Cafe Isobe (2008), Gomen by Shin Togashi (2002). Is there a way to buy dvds like this online and di they usually have english subs too? I’m thinking about buying a dvd player for this purpose but I’d like to know what percentage of japanese movies I could enjoy that way…