Michiko, if anyone could be more prepared than you I would be shocked!
Haruka is going to be so happy and so well taken care of.
Haruka can't be going home with a better mom. You have studied and learned from the best of the best here with all our friends on YT.
One thing you may not have thought of is her water. Ask the breeder to bring water that she normally give Haruka, especially if she's been getting tap water. Each city processes tap water differenty so it may upset her tummy with all the excitement of all the new experiances she will be exposed to in the next few days. Once you get her home you can adjust the water by mixing the old with yours.
It's probably a little extreme to do this but you asked!