The common Japanese Kampo medicine issued by MHLW was sorted and analyzed, record total ingredients, average dosage, total dosage of general prescription, maximal and minimal dosage of general prescription of Japanese Kampo was originated from the classic prescription. The ingredients of each prescription medicine was relatively less, and mostly composed of 4 to 9 ingredients. The average dosage was less, around 15-25 g and the average dosage of single drug was 3.16 g. The dose of Japanese Kampo medicine was relatively less, and it was only about 1/4 of the drug used in Chinese mainland. The reasons were related to many factors like historical evolution of Chinese prescription, the habit of taking medicine, people’s constitution of different nations and so on.