SBY has never been mentioned specifically that I'm aware of, but Lucas is a well-known Akira Kurosawa fan and the general
influences of Japanese culture on Star Wars have been studied and well documented. He has claimed that his inspiration for the droids came from a pair of characters in "
The Hidden Fortress" ("one chubbier, one taller and slimmer") - a common motif in Japanese cinema (and anime). Establishing a connection between Lucas and SBY might admittedly be conjectural, although I could easily see him adjusting his narrative to attribute his inspirational choices to Kurosawa sound more "respectable" than citing some relatively obscure Japanese cartoon that nobody's ever heard of stateside. It really wouldn't be much of a stretch for him to branch into other genres of that culture when looking for ideas, especially when one moves into science fiction/space opera. Pickings of such things were slim back then, and SBY would have been an easy thing to zero in on. He may have just shown Ralph McQuarrie a fuzzy picture of Analyzer from Yamato and the "Machine Man" (Woman?) from
Metropolis and told him to make the new droids look kind of like that but 20% different. That's probably one of those spur-of-the-moment conversations that we'll never know details about.