Assam tea with their own distinctive characteristics. Historically, Assam has been the second commercial tea production region after southern China, the only two regions in the world with native tea plants. The introduction of the Assam tea bush to Europe is related to Robert Bruce, a Scottish adventurer, who apparently encountered it in the year 1823. Bruce reportedly found the plant growing "wild" in Assam while trading in the region. Maniram Dewan directed him to the local Singpho chief Bessa Gam. Bruce noticed local tribesmen (the Singhpos) brewing tea from the leaves of the bush and arranged with the tribal chiefs to
Sayama tea were brought to this region by rivers. The upper layer is made of a reddish loam created by the accumulation of volcanic ash. Together, these two layers make the region unsuitable for growing rice but suitable for tea growing, which requires high precipitation and high soil permeability. It is known that the Japanese people started growing tea trees roughly 800 years ago when Buddhist monks who traveled to China brought back seeds. A historical document from the Nanboku-chō period, , mentions as one of the best regions for tea along with , , , , and . However, the production