This question pop up when i listen First love album

Flash Back to her "First Love" album, she make a massive success in no time in those year .

What exactly the secret behind this album, why this album can be so popular in Japan alone ?

There are a lot of new comer i believe in those year too, yet a new sensation and still teenager (Utada Hikaru ) in that year released an album "First Love" and make a big impact in Japan with 10 millions copies, how come ?

What kind direct or indirect approaches EMI's do to promote this album to the public ?

Does the lyrics it self or the album title "First Love" make Japanese people curious with her works ?

Her family and her mother name, Junko Utada a famous Enka singer in 70's and 80's help her promote her music ?

Is it pure luck or there is a team hard work behind this " First Love" Album ?

Any one know any article related to this massive success or an idea ?