[3] The major ethnic groups[a] that form the core of traditional East Asia are the Han Chinese, Koreans, and Yamato.
[24] Major characteristics exported by China towards Japan and Korea include shared vocabulary based on Chinese script, as well as similar social and moral philosophies derived from Confucianist thought.
[26] The Chinese script was passed on first to Korea and then to Japan, where Han characters acted as the major underlying fundamental linguistic basis constituent of the Japanese writing system.
The ESEA lineage trifurcated from an earlier "eastern non-African" (ENA) or "East-Eurasian" meta-population, which also contributed to the formation of Ancient Ancestral South Indians (AASI) as well as to Australasians.
[29] It is believed that this reduction in body odor may be an adaptation to colder climates by ancient Northeast Asian ancestors, although this is not definitively proven.