they established a system which synchronized production processes owing to close coordination with logistics companies. In Milk-Run logistics, high reception frequency of goods (4 times a day) is performed to maintain small-lot frequent delivery to the assembly lines as much as possible (36 times a day). In addition, a P-lane has been installed in order to reduce the gap between transport frequency and production levelling. Rather than saying that this permits buffer stocks between procurement and production, this works as a mechanism to make stocks visible and to conduct manage the production processes.