Well with the opening of the new Muramasa website, I figured there would be some songs from the OST on it. Well there was and I just downloaded all that I could. Here are the links to youtube!
https://www.youtube.com/watch?v=NnWXDKFeu14&feature=channel
https://www.youtube.com/watch?v=k4pmQYRM7PY&feature=channel
https://www.youtube.com/watch?v=ElEm-njmVmI&feature=channel
https://www.youtube.com/watch?v=206U--mngUI&feature=channel
https://www.youtube.com/watch?v=0CZ8_r1DJrA&feature=channel
The soundtrack is really nice and soothing in my opinon. They are great to listen to, even if you aren't a fan of the game.