Why is Naruto Namikaze Minato called Konoha Hero?

Shortly after the Third World War, Namikaze Minato, the fourth generation descendant of Muye Village, succeeded him. Yellow hair and blue eyes, usually wearing a cloak with the words "Four generations of eyes and shadows", is tolerant and gentle. Because we often win by speed in battles, we have the title of "Yellow Flash", which is famous in the forbearance world. He is one of the heroes who endured the third world war against Konoha. After saving the village by sealing Kyubi no Youko at the cost of his life, he was regarded as a hero to protect Konoha.