Uncle

おじさん

oji-san

(form of address to a man by young people or children in some countries)

伯父

oji

(brother (or brother-in-law) of someone’s parent)

伯父貴

ojiki

(brother (or brother-in-law) of someone’s parent)

叔父

(brother (or brother-in-law) of someone’s parent)

叔父貴

ojiki

(brother (or brother-in-law) of someone’s parent)