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

use

messenger

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

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

to investigate thoroughly

thorough investigation

South Pyongan (a province of North Korea)