Naruto: Konoha's Life Mentor

Kyoichi traveled to Konoha and became a temporary teacher in the Ninja School. Fortunately, he awakened the mentor system.
He can get rewards by teaching others.
So, Kyoichi began his career as a "teacher" in the ninja world.
Shisui: "The teacher's unique will of fire has made Uchiha really find the direction!"
Asuma: "The true meaning of jade is to protect the people, and the advanced will lead the backward, so that Konoha can become stronger!"
Kakashi: "He is my life mentor, he changed Konoha!"
...
Many years later, Kyoichi, who was Hokage, wrote in his memoirs-I really just want to be a life mentor!