There is a reason that this manga is considered one of the greats... yet I still barely see anybody ever talking about it. I understand that it is not currently releasing chapters and was put on hiatus with no near end in sight, but that does not change how good this manga actually is. I highly recommend this for those interested in action manga - with a splash of comedy and raw emotion, even occasionally filling you with anger at times, this is a series that truly engages the reader and will also teach you quite a lot about Japanese history.
The art style sometimes came as a bit of a drawback for me, as there were definitely times when reading this where it just felt like there wasn't as much emotion going into the art style as there was with the story. You can clearly see where Takehiko Inoue was starting to get worn out by his own manga as his art style actually deteriorated a little at times, rather than getting better. It did start to pick back up in more recent issues and some chapters are even more detailed than they were at the beginning it was in no way a bad display, but it just did not feel... as full of life.
Musashi Miyamoto - Widely considered to be one of, if not THE greatest swordsmen in Japanese history.
Sasaki Kojiro - Known as the "Crazy Tiger from Echizen", he is Musashi Miyamoto's deaf-mute arch-rival and friend.
Matahachi Hon'iden - Musashi Miyamoto's childhood friend and the WORST CHARACTER IN THE ENTIRE DAMN SERIES!