Agarwood in Japanese culture

Agarwood is known in Japanese as jinkō, written with characters meaning "sinking incense," the same logic behind the Chinese chénxiāng covered in agarwood in Chinese culture. In Japan, jinkō became the foundation of kōdō, "the way of incense," a formal sensory practice counted with chanoyu, the tea ceremony, and kadō or ikebana, flower arranging, among Japan's classical refined arts.

This guide separates the documented record, much of it tied to surviving objects and texts, from the legend that surrounds agarwood's place in Japanese tradition.

Arrival: the legend of the Awaji Island driftwood

The traditional origin story for agarwood in Japan comes from the Nihon Shoki, the Chronicles of Japan, compiled in the early eighth century. It records that in 595 CE a large piece of fragrant wood washed ashore on Awaji Island. Islanders, not knowing what it was, burned it as firewood and noticed an extraordinary fragrance, and the wood was presented to the court, where it was recognised as agarwood.

Like many accounts in early court chronicles, this should be read as the traditional account rather than verifiable history in the modern sense. It is, however, the consistent starting point in Japanese incense history. Buddhism, which reached Japan from Korea and China in the same broad period, brought incense into temple ritual, a connection covered in agarwood in Buddhism.

Heian court culture

During the Heian period, from 794 to 1185, incense moved beyond temple ritual into aristocratic life. Nobles blended their own signature incenses, and fragrance became entwined with literature and courtship. The Tale of Genji, written in the early eleventh century and often described as one of the world's earliest novels, repeatedly uses incense blending as a mark of refinement and identity, an association still found today in Genji-kō, an incense game built around the novel's chapters.

This period also saw early forms of kumikō, group incense games in which participants identified and compared fragrances, a more social precursor to the disciplined practice kōdō would become.

Kōdō takes shape in the Muromachi period

Kōdō took its codified shape during the Muromachi period, from 1336 to 1573, the same era that produced the tea ceremony and Noh theatre in roughly their modern forms. The shogun Ashikaga Yoshimasa, a major patron of the arts who held a large collection of fine agarwood, is credited with having that collection organised into a structured system, which helped turn incense appreciation into a distinct discipline.

The Oie and Shino schools

Two figures are credited as founders of kōdō's two major surviving schools. Sanjōnishi Sanetaka, a high ranking court noble, founded the Oie school, generally associated with a literary, courtly approach. Shino Sōshin, a samurai said to have served Yoshimasa, founded the Shino school, generally associated with greater emphasis on formal manners and procedure. Both schools survive and teach according to their own conventions.

Under Yoshimasa's patronage, these two founders are also credited with establishing rikkoku-gomi, the classification that remains central to kōdō.

Rikkoku-gomi: six countries, five tastes

Rikkoku-gomi means "six countries, five tastes." It sorts agarwood into six named categories, kyara, rakoku, manaka, manaban, sumotara and sasora, historically associated with places of origin, and describes them using five taste terms: sweet, sour, hot, bitter and salty.

It helps to be clear about what this system is. It is a traditional sensory and poetic classification developed within kōdō, not a botanical or commercial grading standard, and the "tastes" describe scent through the vocabulary of taste rather than literal flavour. The "country" names reflect historical associations and are not reliable guides to where a given piece actually grew. Kyara is generally regarded within the tradition as the most refined category, though practitioners describe each category somewhat differently.

The Ranjatai: Japan's most famous piece of agarwood

The most famous piece of agarwood in Japan is the Ranjatai, a log about 156 centimetres long and weighing about 11.6 kilograms, held in the Shōsōin, the treasure house of Tōdai-ji temple in Nara. Tradition holds that it came to Japan in the eighth century and is associated with Emperor Shōmu, who reigned from 724 to 749. Radiocarbon dating announced by the Imperial Household Agency in 2025, however, indicated the tree was felled between about 772 and 885 in Southeast Asia, which suggests the piece arrived later than tradition holds.

The Ranjatai is famous partly because so few people have been allowed to cut it. Recorded cuttings include pieces taken for the shogun Ashikaga Yoshimasa in 1465 and for the warlord Oda Nobunaga in 1574, and a small fragment trimmed for Emperor Meiji. It remains an object of study as well as a treasure, including recent chemical analysis of its fragrance.

How kōdō is practised today

Kōdō is still taught in Japan, principally through the Oie and Shino schools and some smaller lineages. A defining feature is that incense is heated rather than burned, traditionally on a thin mica plate set over a charcoal ember buried in ash, so that fragrance is released gently with little or no visible smoke. Practitioners describe the act with the verb kiku, usually translated as "to listen," rather than "to smell," framing incense appreciation as an act of close attention.

Formal gatherings, called kōkai, follow set procedures for handling, heating and passing incense among guests, often built around identification games descended from kumikō. If you want to try heating agarwood gently at home, see electric burner vs charcoal for oud.