Company asking me to conduct “English Lunches”

I’m in marketing.

I‘m one of the only few white people in my company. I don’t feel comfortable doing this. I don’t want to be typecast into Gaijin English Teacher.

I didn’t come to this company to teach English.

What is the best way to get out of this without rocking the boat?

edit:

reasons why this bothers me on a personal level:

I don’t want to get othered.

And

I worked my ass off to get out of teaching English.

I love Japanese language and culture, if I wanted to speak English I would have stayed in my country.

I don’t even get much opportunity to speak Japanese anyway and I’d feel resentful.