easyjasub
Tool to add furigana and in-line translation to Japanese subtitles
...The synchronization of input text subtitles is very important to properly associate them.
The program is now in early development stage, you may need to read the the inline help (-h option) or browse the code in http://github.com/riccardove/easyjasub
A JRE is required, even by the Windows .exe version.
wkhtmltoimage is required, take it from http://sf.net/p/wkhtmltopdf
BDSup2Sub may be useful (BDN/XML subtitles are created as intermediate output).
Basic usage:
easyjasub.exe -ja subtitle.jp.srt -tr subtitle.en.srt
java -jar easyjasub-cmd.jar -ja subtitle.jp.srt -tr