Thanks to some Japanese people learning English on twitter of all things, I just found a chrome extension that helps you to learn languages through Netflix.
It provides subtitles in both English and the target language, and for most languages also has a dictionary built in for unknown words .
It’s still under development, so the dictionary isn’t available for Japanese yet, and there’s also no furigana options, but it seems to work excellently for other languages if you’re learning multiple languages, and it still seems extremely useful for Japanese so far.
You can get the extension here for chrome: https://chrome.google.com/webstore/detail/language-learning-with-ne/hoombieeljmmljlkjmnheibnpciblicm/related
Here’s the website for it: https://languagelearningwithnetflix.com/ (be careful there’s an autoplaying video)
They also have a really useful tool to help find titles on Netflix with subtitles in various languages: https://languagelearningwithnetflix.com/catalogue.html#