Conventional Oral Intake vs Delayed Oral Intake With Jejunostomy Feeding After Esophagectomy (JNS Study)

Inclusion Criteria: * Patients who planned to undergo esophagectomy with esophageal reconstruction for esophageal cancer for curative purpose * Patients who can understand the purpose and protocol of the clinical trial Exclusion Criteria: * BMI \< 18kg/m2 or BMI \> 25kg/m2 * Patients who needs colon of jejunum for esophageal reconstruction * Patients who needed enteral feeding before esophagectomy * Preoperative major organ failure (ex. renal failure requiring renal replacement, hepatic failure) * Severe metabolic disorder (ex. uncontrolled diabetes mellitus, uncontrolled thyroid disease) * Other patients who are not suitable for clinical trial