For e-commerce Web service applications, cache should be applicable especially to product information services. However, practical e-commrecer use cases have limited cache ability: (1) a message contain management components, which reduce reusability of cached messages. (2)conent typically consist of positive objects, which makes it harder to maintain chache effectively. To enahance cache ability of such Web services, we propose service decomposition through edge computing, which consist of two types of decomposition: (1) management services decomposition, and (2) content decomposition. A Web service is decomposed into management services and a bare service Management services are chain of intermediary services executed on an edge server. The cache service, one of those services, decomposes Web service content to multiple objects in order to maintian effectively. The paper introduces our cache model and specification and discusses ongoing researc issue on high performance cache management.