[jpop]

I passed on this topic as I don't think I know much but in the spirit of trying to help:

What format of subtitle is in the mkv?
By "embedded subtitles" you mean in the MKV or actually hard coded into the video? (i'm assuming not but you never know)

Post a mediainfo of one of the files that displays as "NONE"
edit: post it in pastebin.com

Thanks for the reply.

I found out it is easily sorted by pressing T on the keyboard.

Cheers.