鉄器時代
the Iron Age
the bronze age
the bronze age
the stone age
a period of human history called the Bronze Age
the Paleolithic Age
the age of cave-dwellers
the Golden Age
the neolithic age
a period of time called the Mesolithic period
the period following the Bronze Age
a period in archaeology called the Bronze Age
the Middle Ages
Korean-style porcelain called {kokuryo porcelain}
the glacial epoch
the atomic age
a Japanese historical period called the {"Jomon"} period