Everyone’s favourite japanese sweet potato! Its deep purple-coloured flesh lends a luxurious feel to the otherwise humble produce. This variety is mildly sweet with a chestnut-like fragrance. Common ways of cooking include steaming or roasting. By boiling, the sweet potato will lose its rich purple hue.
Its purple colour comes from the presence of antioxidants called anthocyanins, which changes colour under different pH levels. Hence, in Japan, the purple sweet potato is also sometimes used as a healthy, natural food colouring.