Japanese Mint OilJapanese mint is a plant. The oil is removed from the parts that grow above the ground and used to make medicine. Japanese mint oil is used for various digestive complaints including poor appetite, gas, indigestion, nausea, diarrhea, gallstones, liver problems, and irritable bowel syndrome It is also used for respiratory tract problems including common cold, cough, bronchitis, and sore mouth and throat. Other uses include treatment of fever, pain,