This is a Toraya card, advertizing an exhibition of the making of wagashi (Japanese sweets). I never made it to the show but loved the card.
I happened to attend the opening of the Yokoo Tadanori Museum of Contemporary Art in Kobe. It was a beautiful, new building but I wasn't too impressed with the selection of his works. I wanted to see more of his graphic collage work, like this postcard's. Instead, there were a lot of repetitive paintings of a female diver, and a woman openly drooling. I didn't know if he was trying to be droll or fetishistic, but they didn't work for me.