Vietnamese oud is agarwood oil and wood from Vietnam, produced from the resinous heartwood of Aquilaria crassna and related species. It is a woody note with a resinous, incense-like character, often greener, cooler and more bitter than the fruity ouds of Cambodia, and Vietnam is the source of kỳ nam, the rarest and most celebrated grade of agarwood.

What does Vietnamese Oud smell like?

Vietnamese oils often open with a sharp, green, slightly camphorous edge before revealing a resinous, incense-rich wood with notes of dried herbs, bitter honey and cool smoke. Sweetness is present but more restrained than in Cambodian or Thai oils, and the animal facets are usually light. Kỳ nam, known in Japan as kyara, is a special case: a soft, oily, resin-saturated wood prized for the rich, lingering scent it gives off when gently heated.

Where Vietnamese Oud comes from

Aquilaria crassna and A. banaensae both occur in Vietnam, where agarwood is called trầm hương. Most wild trees have been cut, so oil today comes mainly from plantation trees that are wounded or inoculated to start resin formation. Natural kỳ nam is now extraordinarily scarce.

• Also known as: Vietnamese agarwood, trầm hương; top grade kỳ nam (calambac, kyara)
• Fragrance family: Woody (resinous)
• Type: Natural (often represented by accords)
• Main origins: Vietnam
• How it's obtained: Hydrodistillation of resinated wood; high-grade chips are heated or burned as incense
• Key aroma molecules: Agarwood sesquiterpenes and chromones

Vietnamese Oud in perfume history

Vietnam has one of the best-documented agarwood trades. From 1580 the Nguyễn lord Nguyễn Hoàng encouraged exports to China and Japan, and calambac became so profitable that a pound bought in Hội An for 15 taels could reportedly sell in Nagasaki for 600. The Nguyễn later made calambac a royal monopoly that helped finance their state. In Japan's kōdō tradition, kyara is the highest grade of aloeswood, and the classification system links it with Vietnam and a bitter taste.

Vietnamese Oud in modern perfumery

Today Vietnamese oud reaches perfume lovers mainly as single-origin oils and incense chips from specialist houses, where age, wild or cultivated source and distillation method are all marketed. In mainstream perfumes the name mostly points to a drier, more incense-leaning oud accord.

How Vietnamese Oud wears and what it pairs with

It is a tenacious base note whose resinous, smoky side sits comfortably with frankincense, cedar, vetiver, rose, saffron, green tea and leather.

Safety and regulation

Every Aquilaria species has been listed in CITES Appendix II since 2004, so international trade in Vietnamese agarwood and its oil requires permits.