I guess what might have happened is an all Japan-USA final.
Or maybe not. Imai was a replacement for an earlier skater who didn't do well in their first assignment. She wasn't listed among the substitutes for JGP South Africa, so she would have had to go Sheffield - taking either Fujisawa's or Murakami's place, and we know how well they skated already.
I do wish she'd gotten an a second assignment, though. However, there's always next year!

(If I'm incorrect with this information, please tell me!)