I think that this is more on the AOR or Resort Pop side of things (by way of Hakone or Shonan) than straight City Pop, but I refuse to split hairs here. Seishiro Kusunose's（楠瀬誠志郎）"Boukensha-tachi" (The Adventurers) is definitely one song to chase the blues away while bombing down the highway.
His 3rd single and also the title track from his 2nd album both released on the same day in April 1987, "Boukensha-tachi" begins gloriously with that guitar and no one should be blamed if they think that Kusunose was channeling some of that inner Tatsuro Yamashita（山下達郎）through the song. In fact, according to his J-Wiki file, the singer-songwriter focused on those wonderful harmonies of Tats for a lot of his early songs, and he had even worked as part of the background chorus for the City Pop legend himself.
Indeed, Kusunose was behind the music with Akira Inoue（井上鑑）handling the arrangement. The lyrics were by Shigeru Okawa（大川茂）, one-third of the vocal group Hi-Fi Set（ハイ・ファイ・セット）.