I had both. My first teacher was Chinese but born and grew up in Japan. She was the best. The second one was an interpreter for USA Consulate.
He taught at Japanese Cultual Centre under Japan Consulate Office in HK. my second best teacher.
I had 3 Japanese Professors at U of T and two of them used to teach foreigner in Tokyo. One of them was born in Beijing before the 2nd world war. (not sure if it was before July 7, 1937). All three were about the same but I took the class for an easy A+.