miniJ is currently the smallest washing machine on the market. Especially for existing residential living space, we redesigned the product mechanism and created this brand-new fully functional washing machine with the minimum size. This washing machine is for young people and new parents, serving as an assistant machine for the entire family. We also designed a special washing mode for babies. Meanwhile, the user habits and interaction between product and users have also been considered by us. In the design period, to create an eco-friendly product, we did a lot of experiments for reducing water cost and achieved remarkable results.