CityPop is a Japanese genre of music that melds popular Western influences of the 1970s and '80s (including funk, boogie, acid jazz, disco, and AOR) with Japanese-style compositions and lyrics that depict an urban way of life complete with the luxuries and excesses afforded by the bubble-era capitalism of the 1970s and 1980s.

About City Pop:

The close of the 1970s saw many Japanese artists, composers, and writers experimenting with new styles of music, often borrowing techniques from their Western contemporaries, with those well-versed in adult contemporary, fusion genres (jazz fusion, acid jazz, Latin, bossa nova etc.), and synth-pop being of particular interest. Onto this musical framework, lyrics depicting an urban way of life, complete with the luxuries and excesses afforded by the bubble-era capitalism of the late '70s to late '80s, were added. There were, of course, exceptions, as some songs pertain more to introspective matters, but those are less common.
In many ways,