From Wikipedia: "In human populations, generation time typically has ranged from 20 to 30 years, with wide variation based on gender and society."
A mere 19-year-old Kage-level ninja? Sure, why not.
How to Survive as an Uchiha
Anime & Comics · Malphegor
Mastery of sealing techniques, space-time ninjutsu, four elemental releases, and even multi-nature fusion techniques—he had it all. Those massive ice giants he created were as tall as tailed beasts, and he summoned them with a simple clap of his hands.
How to Survive as an Uchiha
Anime & Comics · Malphegor
Legit
The farthest door from the bomb swung open. Toji entered like a flash, moving with the precision of a hunter. Though he was farther from the bomb than Iida, his speed was superior.
Toji in My Hero Academia
Anime & Comics · SquirrelChan
Kikidori blinked in confusion. "Who?"
One Piece: The Deadly
Anime & Comics · Raiko_kutima
Franky, polishing some tools nearby, laughed. "Looks like we've got a new little bro on board! SUPER!"
One Piece: The Deadly
Anime & Comics · Raiko_kutima
TFTC
Cursed Eyes (Itachi in JJk)
Anime & Comics · FreddySZN