We analyse the relationship between Public Credit Registries and Credit Bureaus in East Asia by observing credit information markets, in particular, in China, Singapore, and Korea. Singapore's credit information system consists of only a Credit Bureau. China and Korea have gone in different directions. Public Credit Registries play the role of credit information sharing in China, while Public Credit Registries and Credit Bureaus coexist in Korea. The results suggest an important relationship between the development of financial markets and credit information systems. The lower the income level and the heavier the government's hand in financial markets, the greater the need for Public Credit Registries; whereas, financial liberalisation and rising incomes encourage Credit Bureaus.