Necrosis of a reconstructed organ after esophageal cancer surgery is a very serious complication that often occurs soon after the surgery. We report a case of emergency surgery that was performed to treat necrosis of a reconstructed colon 10 years after esophagectomy. A 73-year-old man was admitted to our hospital with complaints of chest pain. His history included a proximal gastrectomy for gastric cancer. His present illness includes endoscopic mucosal resection for superficial esophageal cancer in 1995. Subtotal esophagectomy and right colon interposition through the retrosternal route were performed due to a recurrence in the same lesion in 2005. The patient was immediately hospitalized due to chest pain in 2015. An upper gastrointestinal endoscopy revealed extensive necrosis in the colon. He underwent an emergency operation. The surgical operations included reconstructed colonic resection by longitudinal sternotomy, esophagostomy, gastrostomy, and drainage procedure. The patient is currently under rehabilitation at a referral hospital. There has been no report on the occurrence of necrosis in the reconstructed colon 10 years after esophagectomy.