This song is included in this channel's Japanese song playlist
https://www.youtube.com/playlist?list=PLjDc9r7oZzO6NiLl_amQwEDB-EA0ek00g
Original singer: アン・ルイス ( Ann Lewis)
Composer: 平尾昌晃 (Hirao Masaaki)
Lyricist: なかにし礼 (Nakanishi Rei)
1974
The Chinese version of this song by Teresa Teng is widely popular among the Asian music fan bases. It was published in the album 島國之情歌第一集—再見我的愛人 (1975). The Chinese movie "Love Song" uses it as its theme song.