Abstract
In Japan the consumption tax is raised up to 8%, and will be raised up to 10% in the next year again.
So, many consumer tend to save buying.
In contrast, many stores work retention strategy for good customers like FSP.
However, these good customers are not all customers, so it needs the other strategies for many of "ordinal" customers.
In this study, we propose a analyzing method to grasp the buying behavior, especially we treat proceeded foods that are thought as the most saving goods for many consumers.