Herbarium of the Ancients — Detailed Monograph

Swertia japonica

Read before use: the information below describes traditional and informational uses — it does not replace the advice of a healthcare professional. In case of doubt, pregnancy, breastfeeding, ongoing treatment, or use in children, seek advice before use.

Avoid in cases of gastric ulcer or severe gastritis, as the bitterness may increase irritation. Not recommended without medical advice for pregnant or breastfeeding women, due to insufficient data. Do not exceed traditional indicative doses, as excessive bitterness may cause nausea. Seek the advice of a healthcare professional if taking medication, particularly for digestive conditions.

Infusion — Dried aerial parts (stem, leaves, flowers)

Traditional bitter infusion

Pour simmering water over a small amount of dried plant and let steep for a few minutes. Traditionally consumed before meals to stimulate appetite. A pinch (approximately 0.5 g) per cup, consult a professional before regular use.

Decoction — Whole dried plant

Digestive decoction

Gently boil the dried plant for a few minutes, then let steep off the heat. This more concentrated preparation was reserved for occasional digestive discomfort. Dosage should be validated with a healthcare professional or recognized pharmacopoeia before use.

Powder — Dried plant reduced to powder

Bitter powder

The finely ground dried plant was sometimes incorporated into other traditional Japanese preparations. Professional advice is recommended before any regular use in this concentrated form. Dosage should be validated with a healthcare professional or recognized pharmacopoeia before use.

Where to find it

Obtaining the plant

Senburi is primarily found in herbalist shops specializing in Japanese plants or traditional Asian medicine, rarely in the wild outside its native range.

Harvest season

When to harvest it

The whole plant is traditionally harvested in late autumn, once it has flowered, then dried in the shade.

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