The default play is English,no subtitles.at least it was for me with the VLC player.
This is a mkv.file with Dual audio (English & Japanese)with English and Japanses subtitles.If you wish to change Language and/or subtitling The best and easiest way to do this is with the VLC player.You may download it here http://www.videolan.org/
Grenadier follows the travels of the extremely well-formed and busty Rushuna Tendo, an expert Senshi, and the samurai Yajiro Kojima, a mercenary swordsman. A Senshi or "Enlightened" is one who is skilled to some degree in the use of guns. The series begins with Yajiro and a small army of samurai launching a frontal assault against a fort in an attempt to free their lord, which was taken over by a group of gunners