Isodon Japonicus Extract — INCI reference

What it is

Isodon Japonicus Extract is derived from the leaves and stems of Isodon japonicus, a perennial herb in the mint family (Lamiaceae) native to Japan, Korea, and China. In cosmetics, it functions as a skin conditioner and masking agent that helps reduce unwanted odors in formulations. The plant contains diterpenoids (notably enmein), flavonoids, and lignans, which have been studied for antibacterial and anti-inflammatory properties in research settings. It appears in premium Asian skincare products—particularly serums, essences, and creams from Japanese and Korean brands—often in formulations targeting brightening or anti-aging benefits.

Safety & warnings

No known hazards are documented for Isodon japonicus or its cosmetic extracts. No significant allergen, irritant, or comedogenic concerns have been identified in available safety databases. As with any botanical extract, individuals with known sensitivities to the Lamiaceae (mint) plant family should exercise caution.

Origin & sourcing

Extracted from the leaves and stalks of Isodon japonicus, a perennial herb growing in hills, thickets, and mountain valleys of Japan, Korea, and China (sea level to 2,100 m). The plant is harvested from wild and cultivated sources in East Asia. The extract is typically obtained via solvent extraction of the aerial plant parts.

History

Isodon japonicus has a long history of use in East Asian traditional medicine for gastrointestinal disorders, inflammatory conditions, and as an edible vegetable. Its active diterpenoid compounds, including enmein, were characterized in phytochemical studies in the latter half of the 20th century. The extract later entered cosmetic formulations, particularly in Japanese and Korean beauty products, with CosIng listing a related INCI (Isodonis Japonicus Leaf/Stalk Extract, CAS 246536-68-5) for use as a skin conditioning and masking agent.

Questions everyone asks

What does Isodon Japonicus Extract do in skincare products?

In cosmetic formulations it primarily acts as a skin conditioner and masking agent, helping to improve skin feel and neutralize unwanted odors. It is often included in premium Asian serums and creams alongside other active ingredients.

Is Isodon Japonicus Extract the same as Isodonis Japonicus Leaf/Stalk Extract?

They refer to the same plant source. The INCI name 'Isodonis Japonicus Leaf/Stalk Extract' (CAS 246536-68-5) specifies the plant part; 'Isodon Japonicus Extract' is an alternate INCI form for extracts from the same species.

What plant family does Isodon japonicus belong to?

Isodon japonicus belongs to the Lamiaceae family, commonly known as the mint or deadnettle family, which also includes lavender, rosemary, and sage.

Has Isodon Japonicus Extract been studied for safety?

Available safety databases list no known hazards for this ingredient. Research on the plant itself has focused on its diterpenoid content and traditional medicinal uses; no significant skin sensitization or toxicity concerns have been flagged in cosmetic-use contexts.