Kunai targets

A grove near his house was his training ground. Wooden targets were hung
on the cedar trees in the cluster surrounding him. Each was about the size of a
human head, with two black circles drawn on it.
Itachi stood alone in the deserted wood, kunai tucked between his fingers.
Four in each hand, the eight kunai were his weapons of choice.
“Haah ...” He closed his eyes and slowly pushed the air out of his lungs
from the bottom of his stomach.
As he crouched down, he kicked at the ground as hard as he could. His
body danced into the air and flipped upside down. He held his arms to his
chest, and then shot them out to both sides, and eight flashes of light scattered
in eight directions.
Thk! Thk! Thk! The sound echoed all around Itachi as he landed.
The sharp blades had pierced the centers of the targets on the cedar trees.
“Nice work.” A voice came suddenly from behind him.
Itachi swallowed his breath and looked back to see a boy with black hair
standing there. He was clearly older than Itachi. As proof of that, the silver of
a Konoha forehead protector shone on the boy’s forehead.
“How old’re you?” the boy asked.
Itachi didn’t know his name, but he had seen this boy before. Another ninja
of his Uchiha clan.
“Five.”
“That kind of mastery of kunai at your age. You’re really something,
huh?” The boy stretched out a hand. “Uchiha Shisui.”

Itachi Shinden: Book of Bright Light Chapter 1 Part 2