I'm decades behind the curve on this one, but thanks to the local library I am FINALLY reading Stan Sakai's original Usagi Yojimbo works, starting with Book 1:
I'm about halfway through and it's great. I love Sakai's cartoony animal character designs, his art is deceivingly simple yet complex, and the storytelling is top notch. It's a wonder and a shame that there has never been a full blown Usagi Yojimbo animated film.
Usagi Yojimbo has always been a favorite character form a design standpoint, and now I am glad to actually be adding some real story to my understanding of the rabbit bodyguard.