Hanzo vs Ao

[Masked man]

Hanzo was a famous ninja from Amegakure.
His Kenjutsu was on very high level.
He could use poison.
Kuchiyose - Salamander.
His speed under water was incomparable.

Ao is bodyguard of Mizukage.
He could beat Hyuuga and get his eye.
He is veteran of Hunter ninja.
Sensor.
He could fight with Uchiha Shisui and Uchiha's consider him as a genius.

 

[GiantShuriken]

If it is Hanzo before he "lost his conviction(AKA Plot no Jutsu'd), then its him easily. He beat the 3 sannin when they were in their late 20's/30's.

 

[Icelerate]

Ao isn't that strong of a jounin anyway, Hanzo no difficulty.

 

[genii96]

Hanzo very low diff

 

[Prime Rib]

lmfao hazno would rape ao

 

[Sasori No Danna]

Hanzo, no doubt.

 

[Simple Math]

hanzo easily