abbreviation of 平(へい)安(あん)時(じ)代(だい) (Heian jidai, “the Heian period of Japanese history”)

age, era, period (of time) / the times, spirit of the age / antiquity / a time in one's life, one's days (in college etc.)

importance

(government, historical) one of the 三局 (Sankyoku, “three offices”) in the 太政官 (Daijō-kan), so named because clerical work there were done by the shōnagon and subordinate secretaries

(politics, historical) an acting lesser counselor in the 太政官 (Daijō-kan)

South Pyongan (a province of North Korea)

North Pyongan (a province of North Korea)

period drama

a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages

anachronism