I find it fascinating that in Japan nobody likely says when introducing yourself:
My name is John Wick!
However, that is what a lots of books tell you.
I know in Bengali if you say that people will likely chuckle.
We say I'm John Wick!
Or just John Wick!... (now run for you life or I will shoot you!)lol
I am leaning that native Japanese are just that way.
Usually they will introduce themselves last name first followed by desu. In casual informal settings, I found there can be a lot of fun in their responses, as they try and speak English back to you. Often laughter and smiles follow. The Japanese do like to have fun and laugh a lot.