Transmigrating as the Third Hokage: Make Konoha Great Again!

In the 41st year of Konoha, not long after the Second Shinobi World War had ended.
Amidst the undercurrents and unrest within the village, the four hidden villages outside are preparing for war, awaiting their chance to devour Konoha.
Amidst internal and external troubles, a veteran of the government is transported to the body of Hiruzen Sarutobi.
Along with this came a page of documents in his mind's eye: authority, diplomacy, military, economy, education—five indicators that bound his future to the village.
Starting with the "Reunion over a Cup of Wine" and the rebuilding of his bonds with his disciples, Hiruzen Sarutobi embarked on the path to becoming the strongest Hokage!
"Do you believe in the Will of Fire? Konoha, it's time to accelerate!"
"Winning over geniuses", "Institutional reform", "The general who guards the country of fire"
"The Lighthouse of the Ninja World," "Konoha Green Card," "Uniting the Hyuga and Uchiha"
"Supporting ordinary people," "Iterating technology," and "Universal Hashirama vaccine"
"Resurrecting Tobirama in the body of an Uchiha"...
Hiruzen Sarutobi stood atop the Hokage Rock, amidst a roaring crowd below:
"In the name of the Hokage, let Konoha be great again!"