Back in 1960, Japan’s Kewpie Corp began selling canned baby food, sensing a chance to catch a wave of young families raising kids in an economy roaring back to growth after the devastation of World War Two. Almost 55 years later, the Tokyo-based company sees a new opportunity opening up in rapidly ageing Japan as parents who brought kids up on Kewpie approach their sunset years – what it calls “nursing care food” for the elderly.