Assertion: poetry's history | /r/HasProperty | the heian period
Facets:
Source sentences:
text: The history of Japanese poetry goes from an early semi-historical/mythological phase, through the early Old Japanese literature inclusions, just before the Nara period, the Nara period itself (710 to 794), the Heian period (794 to 1185), the Kamakura period (1185 to 1333), and so on, up through the poetically important Edo period (1603 and 1867, also known as "Tokugawa") and modern times; however, the history of poetry often is different from socio-political history.