Intraductal papillary mucinous tumors (IPMT) of the pancreas are histopathologically adenocarcinoma, adenoma, or even hyperplasia, and, therefore, selection of the treatment strategy is very important. While the International Consensus Guidelines for Management of Intraductal Papillary Mucinous Neoplasms and Mucinous Cystic Neoplasms of the Pancreas have been published, the authors discussed the diagnosis and management of IPMT in the session of Endoscopy Forum Japan 2005. All the discussants agreed to the guideline’s recommendation to resect all main duct IPMT. However, they reserved their consensus on the recommendation of resection for branch duct IPMT which are 5 mm or higher in the mural nodule height. General opinion is that treatment should be considered for lesion where the main duct diameter is over 7 mm, and that dilated branch duct diameter is not an important factor, while it is defined as an important factor in the guidelines.