I'm interested in the following themes: (1) Atrophy/Intestinal metaplasia/Gastric cancer associated with H. pylori. (2) The prediction model of gastric cancer development (3) Autoimmune gastritis (4) Gastric acid inhibition and gastric cancer (5) Chemoprevention for gastrointestinal cancers (6) Risk factors of Colorectal neoplasms (7) Gastrointestinal bleeding (8) Inflammatory bowel disease (9) neuro-epithelial interaction in the gut (10) stem/progenitor cells in the small intestine