This book oddly enough contains advice on how to urinate and defecate. While I appreciate the intention, the advice feels slightly out of place next to the oodles of reason to commit Seppuku. (One does not lead to the other for some reason.)
While the advice might at some points find good soil to sprout in, most of it feels just odd. Depending too much on the context of its time, it lacks the conceptual level of The Book of Five Rings and its ilk to allow its teaching to be broadly applied.
As such this is a curious thing to read through and more suitable as a snapshot of its era than a fount of wisdom.