Kampo and Hanbang: China’s Medicines Echo Abroad

Disclaimer: This page is for historical, cultural, and industrial education only. It is not medical advice, does not recommend any medicine or course of care, and does not evaluate whether any formula is effective for any condition. The institutional and manufacturing systems described here are not ranked as better or worse than one another. Consult a qualified physician with any health questions.

On this site, Kampo is not a detour into Japanese pharmaceutical history. It is one of the clearest overseas names for the continuing life of traditional Chinese medicines. Japan received Chinese medical books and formulas, gave the inherited practice a new name when Western medicine arrived, and later placed a defined group of formulas inside a modern pharmaceutical system. Korea received the same East Asian textual inheritance and developed its own Hanbang, or Korean-medicine, institutions. The resulting systems are not identical to medicine in China, or to each other. They are different echoes of a shared source.

That distinction matters for a museum devoted to Chinese time-honored medicine. The overseas story is not only a trail of exported boxes. A traditional drug can travel as a name, a classical formula, a raw material, a preparation method, or a quality standard. Kampo and Hanbang let us see all five forms at once.

A name created by an encounter: Kampo beside Ranpo

Chinese medicine reached Japan around the fifth and sixth centuries and was adapted over time to local practice, according to the Pharmaceutical Society of Japan. For many centuries it did not need to be labelled as an alternative to a Western system. The naming problem appeared in the middle Edo period, when medicine learned through the Dutch was called Ranpo (蘭方, “Dutch method”). The established medicine was then distinguished as Kampo (漢方, “Han/Chinese method”), as the Japan Pharmaceutical Manufacturers Association explains.

The word therefore carries a relationship inside it. “Han” points toward China; “po” or ho means a method or medical approach. Yet the name does not mean that modern Japanese Kampo is simply present-day Chinese medicine under a Japanese label. Both Japanese professional sources above stress that it developed locally after transmission.

Korea offers another echo. Hanbang is often used in romanization for traditional Korean medicine, while contemporary institutions generally use “Korean Medicine.” The written vocabulary itself records localization: a 2024 historical comparison notes that official terminology shifted in 1986 from terms written with 漢, the character associated with Han/China, to homophonous terms written with 韓, Korea. Korea’s National Institute for Korean Medicine Development describes Korean, Chinese, and Japanese medicine as sharing basic theories and techniques while acquiring distinct features through centuries of local development. The same source, then, produced different voices.

The common books beneath the different names

The deepest continuity is not the label but the formula archive. The Shanghanlun (傷寒論, Treatise on Cold Damage) and Jingui Yaolue (金匱要略, Essential Prescriptions of the Golden Coffer) are Chinese classics associated with the received work of Zhang Zhongjing. Their formula logic became a common reference across East Asia, even as later practitioners interpreted and prepared the formulas differently.

Japan’s modern prescription system makes that inheritance visible in a bounded catalogue. An MHLW document on Kampo and crude-drug preparations identifies 148 prescription Kampo formulas, and the Japan Kampo Medicines Manufacturers Association maintains a 2024 package-insert table for those 148 formulas. The number is evidence of a formal pharmaceutical and reimbursement infrastructure; it is not a count of patients, outcomes, or popularity.

It would also be too simple to say that every one of the 148 came from the same two books. A 2024 comparative study of formulas used in China, Japan, and Korea found 64 formulas that were both listed across the three traditions examined and still marketed in Japan. Of those, 38 — 59.4% — originated in the Han-era Shanghanlun or Jingui Yaolue. The same study also documents formulas created in later Chinese periods and formulas developed in Japan. The precise picture is more interesting than a claim of simple copying: a Chinese classical core, carried abroad, surrounded by centuries of local additions.

The material route back to China

Classical formulas cannot become physical medicines without plants, minerals, processing, and supply chains. Here the overseas echo loops back to China. Tsumura, Japan’s largest prescription-Kampo manufacturer, says it handles 119 types of crude-drug raw material and that roughly 80% of those types are imported from China. That is Tsumura’s own disclosure, not an industry-wide statistic.

The company also describes a China procurement system extending from farmers and production-site companies to SHENZHEN TSUMURA and other procurement entities. Its quality and procurement page says the system records cultivation and processing history, audits production- site companies, and certifies them under the company’s own crude-drug GACP standard, which references GAP principles. This is more precise than saying simply that a Japanese company “owns GAP farms in China”: the public record describes managed and audited cultivation networks involving local companies and growers.

In that chain, traditional Chinese medicines remain present twice over: the formula architecture comes from Chinese books, and much of the botanical material comes from Chinese soil and cultivation networks. The finished packet may be Japanese, but its textual and material genealogies cross the sea in both directions.

A mirror of methods: concentrated granules and inherited craft

Japan’s best-known industrial contribution to this story is not a new classical canon but a preparation and control pathway. An MHLW notice on prescription Kampo preparations states that approved products are, in principle, extract preparations; it also requires the source text for the applied formula, extraction conditions, specifications, and multi-lot test results. Modern clinical Kampo is therefore commonly encountered as a measured dried extract or granule rather than a decoction assembled from loose ingredients for each occasion.

Set beside Chinese time-honored houses, this is a useful mirror, not a scoreboard. Japan’s route foregrounds reproducible composition, extraction, testing, packaging, and institutional listing. Chinese old-brand traditions foreground another layer of knowledge: guarded formulas, ingredient processing, and named making techniques transmitted within a house. On this site, Guangyuyuan represents the protected formula-and-process line, while Lei Yun Shang carries a nationally listed making technique for Liu Shen Wan.

Neither layer makes the other obsolete. Standardization asks how variation can be controlled and documented at scale. Heritage craft asks which material judgments and process knowledge must survive when a medicine moves from one generation to the next. Putting them side by side reveals both the value and the unfinished work of Chinese time-honored medicine without declaring a winner.

The world echo of Chinese traditional medicines

Kampo and Hanbang show that the overseas history of Chinese traditional drugs is larger than export history. It includes a Japanese word formed in contrast with Dutch medicine, a Korean vocabulary that marks both inheritance and local identity, Chinese classics still organizing modern formula catalogues, Chinese raw materials feeding an overseas industry, and standards that turn inherited formulas into repeatable modern preparations.

This is where the site’s chapter route moves from medicines toward technology. The medicine is the visible object; behind it sit the less visible technologies of textual transmission, cultivation, processing, extraction, testing, and preservation. Kampo is not the end of the Chinese story abroad. It is one of the places where that story can still be read most clearly.