Kunai test

The class was basically a test to see how many of the twenty human
figures set up all over the schoolyard a student could hit with kunai in a short
period of time. Each student took a turn individually.

His classmates before him had all run around the schoolyard at top speed,
managing to complete the task in just over five minutes, panting all the while.
Before the class started, they had shown the location of the human figures; all
of them were in annoying places like the top of the tallest tree, or behind a
half-open window on the third floor. So everyone raced around frantically,
and managed to do it in an average of five minutes.

Itachi had done it in thirty seconds. And all his kunai hit the figures
precisely in the head or the chest, in almost exactly the same place each time;
the slight differences were only due to the differences in how much of the
figure was actually exposed. His kunai had all hit with almost flawless
accuracy.

We know where the figures are, and all of them can be reached from the
schoolyard ...

The students before Itachi finished the test, limited by these factors.
His study of them, and the plan he crafted in response, were impeccable.

From the starting point in the center of the schoolyard, Itachi drew a line in
his mind to split the range into four, and then further roughly divided up the
areas of concentration of the targets, before he categorized these as ones he
could reach from the starting point, and ones he would need to move to hit.
There were twelve that required him to move.

He then sorted the targets that required movement, and calculated a
trajectory that would allow him to go round with the most efficiency.
As the teacher gave the start signal, Itachi launched the eight kunai he held
in both hands at eight human figures simultaneously. That didn’t even take
two seconds. From there, he started running, tracing out the route he had
pictured in his head, and made a swift tour of the yard.
Thirty seconds.

Itachi felt like it almost took too long. Shisui could have done it faster.
“W-well done. All right, next up,” the teacher said, sweat rolling down his
forehead.

Itachi Shinden: Book of Bright Light Chapter 1 Part 3