Relationship building is about ‘mutuality’ and how an organizational cultural value system enhances the development of long-termrelationships that influence the marketing strategy process. This paper explains howsenior managers embrace the concept of mutuality in order to establish a partnership arrangement in the context of a vertical marketing system. From the literature, four propositions relating to customer service policy, the process of innovation, relationship marketing and comparative national culture were developed and placed in the context of a Japanese and a South Korean electronics company based in the UK. The propositionswere validated using in-depth, personal interviews with a limited number of senior managers in the two global companies. Evidence suggests that managers in Japanese companies formulate industry and country specific customer service policies, dictate R&D programmes, and spend a long time getting to know an individual in a potential partner organization(s) before they engage in any form of business integration. Whereas managers in South Korean companies are keen to communicate extensively and seek to acquire additional skills and knowledge so that they can innovate and implement cost effective strategies.