I believe i did that too in many posts.
In short Rikkokugomi system made by Munenobu Shino and Sanjonishi Sanetaka and means six countrys/kingdoms five flavors/scents.
Those two known as founder of Kodo which is one of 3 major arts invented that time.
Kodo = Incense Ceremony
Kado = Flower ceremony
Sado = Tea ceremony
I'll copy paste what i posted before...
views about origins of woods in the Rikkokugomi
its commonly said or wrote in many seller sites, articles that
Kyara - vietnam
Rakoku - Thailand
Manaka - malaca"malaysia" < the piece we talking about was classified as manaka
Manaban - malabar coast
Sasosra - India/uknown
Sumatora or Sumandora - sumatra
referance “Kodo Oku no Shiori” written by Ryuho Oheda
simple? its not!, because not everyone agree with that classification and the wood origins
the origin of the interpretation that "rikkokugomi/ (Kidokoro) = Classification by country of production" was established by Takakatsu Takebe, a disciple of Shino ryu, and he wasn't head of the school. "which is why another head school and his lineage refuse it.
another view by kodo master that he got from his predecessor about the 6 kingdoms is this
Kyara/Rakoku = vietnamese
Manaka/Mannaban = Siamese"name of Thailand in old times"
Sasora/Summondora = Indo and mostly from Kalimantan
ofcourse he say there is exceptions for the origins.
and here another view from disciple of master too
Kyara = Vietnamese and its surroundings
Rakoku = Vietnamese
Manaka = Vietnam, Cambodia, Thailand, Malaysia, Borneo, Brunei
Mannaban = Vietnam, Cambodia, Thailand, Yunnan, China, Indonesia, Sumatra
Sasora = Kalimantan island, Sumatra, India"Sandalwood" as some schools use sandalwood instead of agarwood and some use another tree called "Yellow Ripe Incense"
Summondora = Kalimantan Island"
example of complicated views of origins and scents...is the Manaban wood
im sure you realize that in japan the two ongoing schools Shino and Oie...they have close ties but they also have different views regarding some of the woods used in rikkokugomi like its origin, profile and so on..
shino school rikkugomi is only agarwood...while the oie include Sandal and Yellow incense there under Sasora or Samandora/Sumatora.
back to manaban scent Profile in general..
Oie School : Refreshing scent, gentle, no irritation to the nose, slight impact, unique luster.
Shino School : Moderate impact, strong, sweetness, sea breeze scent, unique density, saltiness.
Shino School Manaban before war "i believe here they talk about the "Ōnin War" could be mistaken : Unique acidity, saltiness, a type that seems to be tangy agarwood, and an incredible sweetness.
Now you probably would ask does all woods fall under Rikkokugomi system? no its not its specific certain woods fall under that classification,
That's why even many of Disciples of Schools don't dare to classify it, only left to masters and who is certified by them.
Just like there is many Kyara's but Rikkokugomi Kyara is different profile "Visit Shoyeido etc and have taste yourself to know what i'm talking about"
There is lots of schools in japan old and new however the two main streams are the founders "Shino and Oie"
A list of Flavors according to both schools
Kyara - Shino = Bitter - Oie = Bitter
Rakoku - Shino = Spicy - Oie = Sweet
Managa - Shino = Salty - Oie = Flavorless
Manaban - Shino = Sweet - Oie = Salty
Sasora - Shino = Sour - Oie = Spicy
Sumatora - Shino = Sour - Oie = Sour
Now there is branches and different part of Oie with different views i'm too lazy to list them.