Does she make her own music? I know she writes her own lyrics, creates her own melodies and rearranges tracks. But does she make the tracks herself or rather make the music/instrumental herself?
That's just something I've been wondering since she produces which I guess means she makes her music but I guess I'm too dumb to really understand what that really means.

I think she had help for most of her albums, but she said in some interview that Exodus was the first album she did completely herself. I think she did most of Ultra Blue herself as well, but had help with Heart Station.

There's always people behind her. She just produced her songs in general and basic, while her staffs do the additional. If you see the booklet credits you'll see.
People like her father, Miyake Akira, Tomita Yuzuru, and more are behind her

lets just say that she this 90% of her work