Different culture, different place, different language, different customs. It seems kind of silly to me to insist on importing random Japanese customs that really have no purpose outside of the context of their culture.
I won't insist.
But in our dojo we do also wear funny clothes, bow in, and greet each other in the beginning and end of class in Japanese. Our basic rule (not followed very strictly) is that whoever teaches that night is called sensei. Doesn't feel any odder than those other random customs we follow, to me.