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
You may say "[anata no] otousan ha saikou desu."
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 say ''appa'' in order to say dad in tamil
Were you trying to say "Dad loves you so much"? If so, I believe that would be "Otou-san wa totemo aisheteru desu." I'm not sure though.