Naruto: Make the Land of Waves Great Again

With the system in hand, I have the ninja world! When Ishikawa, who graduated from college, woke up, he found that he had traveled to the world of Naruto and awakened the system cheat: [Please become the great name of the Kingdom of Waves and make the Kingdom of Waves great again! So Ishikawa started by eliminating domestic gangs, quelling civil strife, getting rid of foreign enemies, and finally established a unified political power. Then by opening a ninja school, establishing diplomacy, and vigorously developing the economy, step by step, the country of Waves will be built into the "sixth largest country" in the ninja world! And it wasn't until Ishikawa reached the top of the world that he suddenly discovered that the ninja world had been hiding a huge secret. It is related to the three great ninja wars, to every ninja in the ninja world, and even to the mystery of Ishikawa's time travel...