Assertion: punk's subgenre | /r/HasProperty | japanese steampunk
Facets:
value: with having appeared in mainstream manga
type: OTHER
Source sentences:
text: The first known appearance of the term steampunk was in 1987, though it now retroactively refers to many works of fiction created as far back as the 1950s or earlier A popular subgenre is Japanese steampunk, consisting of steampunk-themed manga and anime, with steampunk elements having appeared in mainstream manga since the 1940s.