No book has ever been published on tonal change and neutralization, two closely related topics in tonal phonology. This will be the first book to be devoted to both.The articles collected in this volume analyze a wide range of data concerning tonal change and neutralization, including post-lexical neutralization which represents a new topic in prosodic research. The volume as a whole covers a wide range of tone and pitch-accent languages in Asia, Africa and Europe, with a main focus on Asian languages/dialects many of which are endangered now. In addition to presenting novel data and analyses about individual languages, it provides typological perspectives on tonal change and neutralization.This volume will serve as an indispensable source of data and analyses for a wide range of linguists interested in phonetics, phonology, prosody, historical linguistics, language typology, endangered languages, Japanese linguistics, and Chinese linguistics.