高こう度ど成せい長ちょう期き

noun

period of rapid economic growth; high-growth era

Often refers specifically to Japan's post-WWII economic boom (roughly mid-1950s to early 1970s).

• 日本にほんの高こう度ど成せい長ちょう期きは、1950年ねん代だい半なかばから1970年ねん代