Dieback has been found frequently on kiwifruit branches more than 10 years old in Kagawa Prefecture in recent years. The dieback often begins at large cut ends and sunburned parts of kiwifruit branches. It usually occurs on thick branches and lateral branches, but in serious cases, primary and secondary scaffold branches and trunks are also affected. Phomopsis sp., Fusicoccum aesculi and several other fungi were isolated from the diseased branches. Both isolates of Phomopsis sp. and F. aesculi were pathogenic to kiwifruit branches. The two isolates of Phomopsis sp. were also pathogenic to fruits of kiwifruit, satsuma mandarin and apple and to branches of peach and Jananese pear. The two isolates of F. aesculi were also pathogenic to fruits of kiwifruit. Based on morphological and cultural characterisitics, the causal pathogens were identified as Diaporthe sp. and Botryosphaeria dothidea, which are the same as kiwifruit soft rot fungi.