The state of being young and immature; callowness, greenness (inexperience); a callow youth, greenhorn, or whippersnapper.
köken: From the 出世魚 (shusse uo, fish that change names as they grow older), specifically the 青魚 (aouo) form of the 鱸 (suzuki, Japanese sea bass). At two years of age it is still midway through its growth, hence transferred from the meaning of 青 (“young, immature”) combined with 二才 (“two years old”, connoting immaturity). Alternatively, “二才” is a development from classical Japanese niise (“young man”;…