This book provides the details of Japanese climate litigation, positioning them both within the global trends of climate litigation and on the trajectory of Japanese past pollution lawsuits. It identifies the barriers that hinders the number of climate cases in Japan, a country known with a significant low litigation use. It then discusses the future prospects for climate change litigation in Japan by comparing with tobacco litigation in the United States. This original work makes a significant contribution to the international academic community, by describing Japan's climate cases, previously little known internationally.