Japanese leather. In a country where paper is usually considered the material par excellence, leather is an important production sector. One of its key qualities is the gradual change that endures after years of use, which does not mean a reduction in value at all, but gain in character. Creatives of Nendo, one of the most famous Japanes design firms, let themselves be inspired by this particular feature, and have thought about to exploit it through the use of tanning oil or protective sunscreen to get an invisible pattern on the surface of the leather that covers five different items types: folders, book covers, card holders, containers and stools. At the time of purchase the leather looks smooth, but with the use of the object and exposure to sunlight the pattern gradually appears, and then disappear again. The intent is to create a product that emphasizes leather’s beauty when used but also to create surprise and affection in the user. Absolutely invisible before exposure to sunlight, thanks to a clever mixture of tanning oil, SPF 50 protection and powder, the collection has four different patterns.