She still young to retire "26 years old " , i guess she got to much burden within herself. As a famous singer many fans expecting her to always make good song , in the end maybe she stressed out , tired and she want to take a break from her routines life .

I guess this bye bye for her English work, maybe she will continue make an album but only Japanese Album. I'm hoping that way, her Japanese album lot better on every aspect.
On her Japanese Album she's not stuck on one kind genre, write and better and meaningful lyrics and that's more like to her.

I think Hikki doesn't need to entering US music industry, she has many fans out there in this earth. Who will bought her Japanese works no matter what, even the fans doesn't understand Japanese words.

Music were universal it can reach every aspect in life, words is not a boundary