My manager in my new first job is kind of touchy. Is this normal behaviour ?

I've lived in a very conservative country being Japan for most my life and recently moved to America for study, where I have gotten my first new job at a coffee place. Now i don't mean to waste peoples time but i don't know if this is normal since people in America are generally very friendly with each other and greet each other using physical welcomes.

My manager often likes to take pictures after every shift with work people, and manager says it is reason for memories and a Instagram video edit.

last Monday my manager was taking the picture with me and wrapped his hand on my waist. I thought it was fine and so didn't make a big deal since he seemed very nonchalant however last Wednesday he instead put hand on my backside. I moved away and he said this is normal when i asked what he was doing. he seemed mad

I know it wasn't normal because even though Japan conservative, this is still inappropriate.

I started doubting myself again until yesterday when he hit my backside after i made a joke. I got embarrassed and mad and told him off but he only laughed!

Please give me information whether this is normal in America. Being overly touchy. What do i do?

Thank you

My manager in my new first job is kind of touchy. Is this normal behaviour ?
Post Opinion