Unknowingly, time had reached the golden month of October. Nearly a year into his tenure as Hokage, Minato had grown increasingly adept at handling all kinds of affairs.
However, his mind had not been on Konoha's political affairs lately. The reason was simple: Kushina's due date had arrived. According to the calculations, she would give birth on October 10.
This was not merely a matter for their family; it concerned all of Konoha. For this reason, the retired Third Hokage, Hiruzen Sarutobi, had stepped back into office and taken over Minato's duties for the time being, allowing him more time to stay with Kushina.
Kushina was Konoha's Nine-Tails Jinchuriki, but childbirth was also the time when a Jinchuriki was at her weakest. One misstep could allow the Nine-Tails to break free from its seal, and the consequences would be extremely severe. In preparation for that day, the Third Hokage and the others had discussed matters with Minato Namikaze and Kushina more than once, explaining the plan for that day in detail to ensure nothing went wrong.
Two days before Kushina was due to give birth, Hiruzen Sarutobi personally visited Minato's home with his wife. The four of them sat facing one another.
Hiruzen did not look particularly old at the time. In his fifties, he was still in the final prime of his life. "Kushina, I've told you many times before the child's birth, but I still have to say it once more today. When the child is born, the Nine-Tails' seal will be at its weakest. This happened to your predecessor, Lady Uzumaki Mizusu. At the time, the Nine-Tails' seal nearly collapsed, and disaster was only narrowly avoided.
"Therefore, to prevent any accidents during childbirth, you must give birth within a barrier far away from the village."
Kushina Uzumaki