It took around 20 minutes of me going through my iTunes library before I found Wo He Ni by Teresa Teng.
Of course, Teresa was singing and releasing records in Japanese at the time, and there exists a recording of her singing the original Japanese version of the song as well.
The Japanese lyrics are from the perspective of someone from a small town in presumably Hokkaido, who has since left for the big city. This is a common general theme in Enka songs of the era, of course during this time many Japanese were leaving small towns for cities.
the string section flourishes and drawn out vocals really give the track a springtime longing sort of feel.
And there's a great version by one of my favorites, Fuji Keiko (藤圭子.)