It’s a superfood but natto as we know it. Japan’s slimy fermented beans are coming your way

Comprised of smelly soya beans held together by strands of mucus, the ancient dish is appearing in health food shops across the world It is smelly, slimy and contains bacteria – and a sizeable number of Japanese wouldn’t touch it with a pair of barge pole-length chopsticks.

But after centuries as a breakfast food for Japanese diners with nerves of steel, natto is emerging as a global superfood to rival kimchi , kombucha and kefir . Its exact origins are unknown. Some…