[Update: Thank you to Ryan Estrada for pointing out Stan Sakai's Facebook comments about this post. By way of clarification, these pages were already posted in their entirety on the Tumblr account credited at the bottom of the post. I didn't scan them myself, but it was still thoughtless not to contact Mr. Sakai and ask before sharing them here. I regret not doing that and apologize.]
The January 1991 issue of Amazing Heroes (Issue 187) included this cool eight-page comic by Stan Sakai on his process in producing Usagi Yojimbo. There was also an accompanying interview with gems like this: "I'm not really that into manga. It's funny: whenever I go to conventions around the country I'm always put on a manga panel, I guess because I'm Japanese and Usagi's about Japan. But I know almost nothing about manga. So I just say my two cents' worth and keep quiet the rest of the panel."
Twenty years later, it's still an insightful (and delightful) read. Check out a couple of the pages below; Vingt Et Un has the rest.