 In this study, we found that the presence of gastrointestinal anastomosis was a significant factor in achieving diabetic remission after pancreatic surgery. Additionally, we determined that the combination of preoperative 24-hour C-peptide excretion and the predicted remnant pancreas volume can be used to accurately predict postoperative pancreatic function. This article was authored by Desakuyamata, Haydnori Takahashi, Keisukai, and others.