A 71-year-old woman was admitted as an emergency with a three-day history of repeated vomiting and epigastralgia. An upright plain radiograph showed a huge quantity of air and two distinct fluid levels in her stomach, while a CT scan of the abdomen showed the stomach to be significantly dilated. As upper GI series revealed typical features of mesenteroaxial volvulus of the stomach, hence a diagnosis of gastric volvulus was made. Fluoroscopic examination of the stomach also showed a gastric volvulus of mesenteric type and occlusion in the lower body of the stomach. After an endoscope was inserted further into the duodenum, the endoscope was directed into a reverse alpha loop. As the endoscope was retracted with its tip hooking the duodenum, rotation was successfully corrected. This paper describes the classification, diagnosis and treatments of gastric volvulus. We studied the clinical characteristics of the attempted endoscopic reduction of gastric volvulus reported in Japan between 2000 and 2012, identifying 40 cases using the medical journal search engine Ichushi-Web (Japan Medical Abstract Society). The results indicate that mesenteroaxial (86％ of cases) is more prevalent than organoaxial (8％) volvulus of the stomach, and the group of cases with idiopathic volvulus were corrected endoscopically except patients with lax ligaments stabilizing the stomach. We suggest attempting reduction of gastric volvulus endoscopically at first.