Here is an assortment of playful Japanese postcards from the late 19th and early 20th centuries, found in a recent book by collector Hiroki Hayashi entitled "Antique Cute Post Cards in Japan" (Nippon no kawaii ehagaki). Betty Boop (Yamaguchi Seikyokudo Co., Ltd. - c. 1930s) Betty Boop (1937) Betty Boop, Mickey and Minnie (1936) Mickey (c. 1920s-40s) Kewpie Mayonnaise ad (1932) Kewpie (c. 1920s-40s