Short answers, pulled from the story.
City pop is urban pop music for those with urban lifestyles as defined by author Yutaka Kimura. It is described as a broad vibe classification rather than a strict genre term according to Jon Blistein of Rolling Stone.
Record companies and music magazine editors began using the term city pops in the late 1970s to promote music with an urban atmosphere. An article published on the 1st of July 1977 introduced Takao Kisugi Tatsuro Yamashita Jun Fukamachi and Junko Ohashi as city pops musicians.
Electronic instruments such as the Casio CZ-101 and Yamaha CS-80 synthesizers shaped the sonic landscape of the era. The Roland TR-808 drum machine provided rhythmic foundations for many tracks produced during this period.
Tatsuro Yamashita is sometimes referred to as the king of city pop due to his commercial dominance and songwriting prowess. He incorporated complex arrangements into hits that contributed to the genre's peak popularity during the 1980s.
Miki Matsubara's song Mayonaka no Door Stay with Me took the No. 1 spot on Spotify's global viral chart for the week of the 16th of December 2020. It broke Apple Music's J-pop top 10 in 92 different markets proving its global appeal.