Why do Naruto always shout out the name of Ninjutsu before launching Ninjutsu?

Just like China Wushu is also shouting "Ha" in the war, it gives courage to oneself, gives momentum to the enemy and reminds the audience. Naruto is a warm-blooded animation, so it will be more dynamic. Don't you think the righteous man who performs Ninjutsu every time is very motivated and powerful? This is the charm of Naruto. Isn't it fun?