Kampō Medicine

Kampō is the traditional herbal medicine system of Japan. It grew from classical Chinese medical texts and was shaped over many centuries into a distinct Japanese practice. Today it is taught alongside modern medicine, and many Japanese physicians prescribe it within the national health system.

Rather than selecting a remedy for a single symptom, a Kampō practitioner looks at your overall pattern, called shō. A consultation typically includes a detailed health history, pulse and tongue observation, and a hands-on abdominal assessment known as fukushin. You are then matched with a standardized multi-herb formula, usually taken as extract granules.

People use Kampō for digestive discomfort, menopausal symptoms, fatigue, seasonal allergies, colds, and recovery after illness or surgery. It is also used to support comfort alongside conventional cancer care and to support older adults. Practitioners describe it as tailoring a formula to the whole person.

The evidence is moderate, and stronger than for many traditional systems because Kampō is studied within Japanese academic medicine. Randomized trials exist for several formulas, though quality varies and many reports appeared in Japanese-language journals. Findings for one formula do not apply to all of them.

Herbal formulas can have real effects and interactions. Some, such as those containing ephedra or licorice, may raise blood pressure or lower potassium. Tell your doctor and pharmacist about everything you take, and choose a qualified practitioner who sources formulas from regulated manufacturers.

Kampo means the method of the Han, a name that reflects its roots in classical Chinese medicine. Chinese medical texts and herbal knowledge reached Japan from about the 5th century, and Japanese physicians studied them in the following centuries. During the Edo period, when Japan limited foreign contact from 1603 to 1868, practitioners developed their own style, with a smaller set of formulas, careful attention to dosing, and palpation of the abdomen known as fukushin.

Todo Yoshimasu (1702 to 1773) was a leading figure of the Kohoha, or ancient formula school, which returned to the early text Shanghan lun and favored direct observation over theory. In the Meiji era after 1868, the government promoted Western medicine, and Kampo lost its official standing. It was revived in the 20th century by physicians such as Keisetsu Otsuka (1900 to 1980), who taught and wrote about classical formulas.

Modern Kampo is made largely of standardized extract products. Japan listed the first Kampo extracts for national health insurance in 1967, and coverage expanded in 1976 and in later years. About 148 formulas are insured today, and Kampo is part of medical school education in Japan. Surveys have reported that most Japanese physicians prescribe it. Manufacturers produce the extracts under pharmaceutical quality standards.