Spring = Plum Blossom (baika)
Summer = Lotus Leaf (kayô)
Autumn = Royal Steward (jijû)
Autumn-to-winter = Chrysanthemum Flower (kika)
Autumn-to-winter =Fallen Leaves (rakuyô)
Winter = Blackness (kurobô)
(It is interesting that the autumn to winter "season" is given heavy emphasis. The same thing occurs in the categories of women's clothing, where the number of named outfits for this same period of the year is also highly elaborated.)
In the same way that "chocolate cake" may be a category, but Aunt Martha's chocolate cake will be distinctive, each type of scent had a basic repertoire of ingredients that gave it a particular character, but recipes were given individual variation when they were created.
The main ingredients used were: Fragrant tropical woods such as jinkô, and kyara, both types of aloeswood. (Jinkô literally means "sinking" because the condensed resin of the dead wood is heavy.) Also, sandalwood (byakudan.) Spices such as clove, star anise, cinnamon bark; condensed resins like amber, camphor, and benzoin; pine needles, lily flowers, bivalve shells; and some animal substances like deer musk and ambergris.
Combinations of these elements, many of which were imported and hence very costly, were macerated together with a moist substance such as plum meat, honey, or arrowroot paste, and the resulting mixture was set to ripen in ceramic jars, often buried near running water. When the jars were opened, the incense was to be used immediately, before it had a chance to dry out and lose potency.