As the incidence of early gastric cancer increases, gastric tumorlocalization has become an important issue. Several diagnostic methods have been proposed for preoperative and intraoperative gastric tumorlocalization. These include endoscopic metal clipping, computed tomographic gastrography, endoscopic tattooing, and intraoperative endoscopy. However, in spite of various methods, tumorlocalization has its limitations; thus, new diagnostic alternatives need to be developed.