Familiar, affectionate term for one's own father or a father figure. Often used by children or in casual family settings. Can also be used as a prefix before a name (e.g., パパさん太郎).
パパさん、今日は何時に帰ってくるの？
Dad, what time are you coming home today?
うちのパパさんは料理が上手なんです。
My dad is good at cooking.
male pet owner
Used to refer to a male pet owner, often by the pet's perspective or in pet-related contexts. Not a general term for 'owner'.
ワンちゃんのパパさんは毎朝散歩に連れて行っている。
The dog's dad takes him for a walk every morning.
These are this doggy's dad and mom (owners).
父親 is a neutral, formal term used to describe a father objectively (e.g. in official contexts), unlike the warm, informal パパさん.
お父さん is the standard polite word for father, while パパさん is a more casual, family-register term for the same person.
お父様 is a very formal, honorific way to refer to someone's father, whereas パパさん is casual and used affectionately within the family.
counter for people
Derived from パパ (papa) with the honorific suffix さん (san), creating a familiar yet polite term of address.