The byword seems to be: whatever
length fits the story.
Not exact matches
Next you can trim the body to the
length you desire (long enough for 15 beads to
fit into if you are reading along with the
story).
Shorts are a whole other
story, there's an ideal
length /
fit as explained in the graphic below (scroll down).
The Berserk franchise
fits the «Musou» style very well and the Berserk
story gives a depth and a
length that the genre generally lacks.