A 67-year-old man reported nausea and appetite loss 1 day after eating persimmons. Upper gastrointestinal tract radiograph and endoscopy showed a gigantic bezoar. Because of repeated nausea and abdominal pain, the man was admitted and treated conservatively. One week after admission, we conducted an emergency gastrectomy due to perforation of the gastric ulcer. The post operative course was uneventful and the man was discharged. Early surgery is recommended if conservative therapy is not effective.