In Japan, Santa is depicted at times as amazingly slim and trim. That's because they are working with the mannequins they have and they don't care about padding him out to fit some Americanized image. Besides, the Santa costumes at hand were sewn with a Japanese physique in mind. If you're going to dress up a figure, you don't want to have to custom order an outfit for the portly gentleman.
Among the many things that said, "Japan" to me, were the skinny Santas that popped up in various displays. I miss seeing the slender Santa as one of many little reminders that Christmas is something rather different in Japan.