Ota Isan Co.Ltd. was established in 1879, the 12th year of the Meiji era. Headquartered in Bunkyo-Ku, Tokyo, we specialize in developing, producing, and selling various prescription and over-the-counter stomach medicines and various health foods. We also have sales offices in Hong Kong, the United States, and Singapore. Ota Isan has excellent efficacy and safety, especially in its unique formula of aromatic stomach medicine, which is comfortable to take, fast-acting, and strong. Over the past 130 years, Ota Isan’s stomach medicine has become a must-have medicine for Japanese families. We are a company that has always been committed to providing the best medicine to people with dedication.