I'm gonna bet $5 that the Japanese OCR that this program does is a modification of their Traditional Chinese OCR--because it's AWESOME at reading kanji, it's pretty good at hiragana, and runs into a lot of the problems that first and second-semester Japanese students have with katakana. I ran a quick test, and it performed really well; every single error I found was in kana, lol.
This program would work really well for the transcribing portion, at least in my language. Correcting the mistakes that it does make is no big deal, and the rest of the work is just the other tedious portions--double-checking, formatting and putting in time codes, lol.