Namikaze Minato is the fourth generation Hokage, and he is respectfully called the Golden Flash animation. The first chapter of the animation has a little introduction. In the 367th chapter, Jiraiya and Tsunade learned that Naruto is the fourth Hokage. The son of the Hokage (named Namikaze Minato), Jiraiya, who was the master of the Fourth Hokage, also pointed out this point, and he also said that seeing Naruto was like seeing his own grandson. In addition, Naruto's mother was also identified as Uzumaki Kina, a female ninja from the Kingdom of Whirlpool. It was also pointed out from the conversation that Naruto looks like his father, but his personality and ninjutsu are like his mother (should refer to the type who is good at ninjutsu); even his surname is the same as his mother's surname, which seems to hide the fact that he is a fourth-generation son. The name Naruto, according to Jiraiya's memories in Chapter 382, ??comes from the name of the protagonist in his book "Jiraiya's Heroic Story" - Naruto.
Also, in Chapter 370, it is known that when the Fourth Hokage sealed the Nine-Tails, he deliberately divided the power of the Nine-Tails into Yin and Yang halves, and sealed only the Yang chakra in his son. Jiraiya believed that the fourth generation had a special purpose in doing this, and he must know that something important was going on.