Yes, Nana Okada is singing (the girl in the video). This song is an original song by her and is included in the album 「'77新しい日記帖」('77Atarashii Nikkicho). She was active as a singer from 1975 (age 16) to 1980, during which time she released 15 singles and 8 albums. (Later, 3 songs were released in 1986 and 2019) She is active as an actress. Thank you for your comment!
@@anbncndnenfngen Thank you for this video, I have been looking for information about her for a lot of time, years I may say. This is my favorite song in the world. And I am glad, I know more about her, do you know if is she married or has kids? thanks!
@mica.co5918 She is single and has never been married. Of course no Kids. In the lyrics of the new song 「坂の途中で-Saka no tochu de-」(Meaning: "In the middle of the slope") released in 2019, she sang, "I'm not married, but I wanted to have children." ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-oS7GvikibpM.html
