Otousan is someones father. Chichi is referring to your own [My dad]
there are other sayings, more or less formal:
informal: papa, tousan
formal: otousan, chichi
he wa ching wung choo
The Japanese symbol for dad is 父
Konnichiwa otosan(Kon-ee-chee-wa oto-san)
DAD: "What IS he doing?" MOM: "It's because he's just a kid."
you are 3/4 Japanese
The meaning of did dad say as dad did is the dad did whatever his dad told him to do.
tousan means "dad" in Japanese.
otousan
Otousan
You may say "[anata no] otousan ha saikou desu."
His dad is Japanese
if it's your dad--- chichi if it's someone else's dad---otousan