They dont? thats such BS. The skater is still exacuting and landing the jump even if its the other way around. such a dumb rule.
I don't believe it's the JSF that didn't allow this.
Rinks in Japan are very crowded so Satoko learned her jumps in Japan in the other direction due to space and safety. Someone can correct me if I'm wrong, but I believe she started off learning jumps in her natural direction when she started skating in Texas.