Double Coating is getting popular in production of wood free coated paper grades. This is the world trend. Japanese trend in coated paper production is not free from the world trend. There are several reasons to install new duble coating systems or to replace conventional single coating systems with modern double coating ones. What are the advantages of double coating, paper quality or economy ? Our answer is straightforward, “Both”. Paper quality and the production cost have to be optimized. Double coating gives us flexibility to optimize the paper quality, the production cost, and runnability, as well. No.2 Coater as Ishinomaki Mill was rebuilt from a single coating blade coater to a double coating blade coater in 1992. In this paper, we describe the fundamental concept for No.2 coater's double coating and the experiences at the mill.