Yanagi's main focus was on beauty. The beauty of folk crafts, he argued, lay in: (1) the use of natural materials and "natural" hand-made production; (2) traditional methods and design; (3) simplicity and (4) functionality in form and design; (5) plurality, meaning that folk crafts could be copied and reproduced in quantity, leading to (6) inexpensiveness. Beauty was also be found in (7) the fact that folk crafts should be made by anonymous – or "unknown" – craftsmen, and not by well-known named artists. Finally, (8) there was the "beauty of health", whereby a healthy attitude during the manufacture of folk crafts led to healthy crafts. In other words, beauty and folk crafts were the product of Japanese tradition – a tradition which he emphasised by saying that "mingei" should be representative of the regions in which they were produced and make use of natural materials found there.