My pleasure!! Thank you for finding these videos because I've been waiting for a Japanese version to be posted!!
Here it is! I omitted most of the background comments the male announcer made, and the comments where Shizuka just says what kind of jump or spin was done.
SP
Before she starts, the male announcer mentions that she won the JGP Final last year.
After 3A: "Very good. The flow out of the jump is extremely good."
After 3Lz: "Very stable. There's no break."
During the step sequence: "While showing light and easy movements, she deeply and clearly performs the edge work and steps, and that's why she's a skater who gets high scores on the step sequence." The male announcer then mentions that among the 3 first-year seniors, Aliona gets the best PCS scores.
After she finishes, the male announcer says, "She showed us a beautiful performance! It's her first Final, and she had to skate first, and in this stressful environment, she had confidence and skated freely."
During the replays:
Shizuka says, "She had good speed going into the 3A and good height on the jump. She also fully rotated 3.5 times, so she's going to get very good GOE on this jump. And then the solo jump, the triple lutz, was also very good--there was absolutely no break/wavering." The male announcer mentions that Aliona holds the SP world record score, and Shizuka says, "Not just the jumps, but also the steps and spins were level 4 and should receive high GOEs, so I think she'll receive a very big score today too."
Then when the score comes up, the male announcer says, "At the Final, suddenly we have a new world record! On this big stage, she's reached an even higher height!"
FS:
Before she starts, the male announcer mentions, "she had confidence and refreshed her world record score in the short--16-year old Kostornaia. Last year's JGPF winner is now, one year later, aiming to win the gold medal at the senior GPF."
After 3A+2T: "Good height."
After 3A: "Very good!" "Good height!"
After 3Lo: "Very clean."During step sequence: "Her edge work is very clear."
Male announcer: "Over the 2 competitions of the GP series, she was the only skater who got all level 4s on all her spins and steps. She did not lose a level even once!" [Of course he says this right before her steps are judged level 3!
]3F+3T combo: "Her air position is very nice."3F+1Eu+3S: "Very good. She generated good speed."
Dance break: "With this expressiveness, she charms the audience."
3Lz: "Wonderful!" "She landed this too!"
Combo spin: "The change of positions is very smooth."
At the end, the male announcer says "she finished her performance beautifully! The leading lady of the new generation of ladies. Kostornaia showed us a wonderful performance. Last year's JGPF winner showed us that performance on the senior stage. [cut to Alina] Soon we'll see the final skater, who will decide the result of the competition--queen [i.e., World champion] Zagitova enters the rink."
Replays:
Male announcer: "Kostornaia's level of perfection is amazing, isn't it?"
Shizuka, "Very much. From before, she was always a skater who completed every element--jumps, spins, steps--consistently, but this year with this program, which includes triple axels, she been able to get high GOEs on everything. There have been many competitions where she hasn't made a single mistake."
Male announcer: "At last year's Junior Final, she did not do a triple axel, so over this past year she's shown improvement."
Shizuka: [during solo 3A replay] "Yes. It's the height. While generating good speed, that height. [3F+3T combo] The air position. She's a skater who shows extremely good flow [on the landing], so it's easy to give her high GOEs; it's easy to appreciate her jumps because they're very clear.
Male announcer: "When asked whose triple axel she uses as a model/reference, she said Mao Asada's. There are four skaters who won the Junior GPF and then won the Senior GPF the following year: Mao Asada, Yuna Kim, Medvedeva, Zagitova--and they are all Olympic gold and silver medalists. Kostornaia's personal best in the FS is 159.45. She doesn't have a quad, but she's able to fight using her high level of perfection."
Shizuka: "Yes, today as well she was able to do many wonderful elements that will receive high GOEs."
After the total score comes up, the male announcer says that she was able to break both the SP and the overall world record scores at the Final.
I have to say, the super high-res video makes Aliona's pink hair very obvious.
What did she do to her hair?! 
I don't think I've ever read/heard anywhere else that Aliona uses Mao's 3A as a reference, but that's cool if it's true! :agree:
But I also think she has the best hip action of the girls. :yes:
but it seems much less awkward than her old dancing videos. 
I couldn't understand what the GoogleTranslate translation meant--"during the landing, she goes to the south"?? 
I’m thinking positive thoughts in Aliona’s direction.
