Firstly , this part analyzes development features of japanese industrial group , including formation factors , industrial distribution and scale , types of internal structures , development status and problems . secondly , on basis of expiating four typical cases , namely industrial group of toyota auto , kitakyushu industrial group , ic industrial group of kyushu , textile and clothing industrial group of fukui , this part summarizes basic laws of industrial group evolvement and its impacts of regional economy . thirdly , this part makes a theoretical summarization on relation between industrial group and unbalanced development of regional economy in japan , holding the view that industrial group has not only economy growth effects , but also economic structure evolvement effects and social improvement effects 首先，分析了日本产业集群的发展特征，包括它的主要形成因素、行业分布及其规模、内部结构类型、发展现状以及存在的问题;其次，对丰田汽车产业集群、北九州产业集群、九州地区ic产业集群、福井纺织服装产业集群四个典型案例进行剖析，总结了产业集群发展变化的基本规律及其对所在区域经济发展的影响;在此基础上，对日本产业集群与区域经济非均衡发展的关系进行理论总结，认为产业集群不仅有经济增长效应，还有经济结构演进效应和社会进步效应。
