I just have found this utility to add furigana to Japanese subtitles. It's a perfect tool for immersion if combined with subtitles from jpsubbers or Kitsunekko. It can also generate HTML files to look it up with Anki, combine JP subtitles with English one...



I highly recommend it.

Oh nice! Much better than kanasubs where it just converts the transcript to pure kana.

http://kanasubs.com/

This looks interesting.  The .JGLOSS option(which I've never heard of) seems especially useful.  Need to look into this further.