銅器時代

どうきじだい

noun

•

Copper Age (period in which metal tools started to be used alongside stone tools)

銅	copper
器	utensil, vessel, receptacle, implement, instrument, ability, container, tool, set
時	time, hour
代	substitute, change, convert, replace, period, age, counter for decades of ages, eras, etc., generation, charge, rate, fee