Glitch caused a double post, my apologies.

Researching possible character sheets we could use though. 

(Skill Levels: 1 Student, 2 Genin, 3 Chuunin, 4 Spec Jounin, 5 Jounin/ANBU, 6 Kage/Sannin)

Name:
Official Rank:
Sensei:
Associated NPCs of Note:
Home Region:
Wealth:
Reputation:
Other Non-Ninja Skills:
Vices / Characters Hot Buttons:
Bio:

Ninjutsu:
Medical Jutsu: 
Sealing: 
Summoning:
Taijutsu:
Genjutsu:
Kenjutsu (Weapons):

Intelligence:
Strength:
Dexterity:
Willpower:
Stamina:

Chakra Potential:
Chakra Control:

I think this would be all that would be needed to define a character that could exist in the Naruto universe. Regardless of the type of game or era in the Naruto Universe, we'd need something like this. Whether it's Clan political organization, Theater scale war plans, or all on a Genin team together, at a minimum these seem to be the stats the GM would have to know.