This book is about why and how central and local governments clash over important national policy decisions. Its empirical focus is on the local politics of Japan which has significantly shaped, and been shaped by, larger developments in national politics. The book argues that since the 1990s, changes in the national political arena, fiscal and administrative decentralization, as well as broader socio-economic developments have led to a decoupling of once closely-integrated national and local party systems in Japan. Japan's experience is compared with Germany, Canada, and the UK to explore sources of multi-level policy conflict.