There ARE some Africans there, but usually they are bouncers or flyer distributors for strip shows, burlesques, etc.
Shady and semi-shady Japanese outfits sometimes use them cuz customers who often naturally want to avoid confrontations have those sensitivities 500% sharper if the confronter is really black and big:
“I want this unexpectedness to GO AWAY”
Usually they’re in Shibuya, Roppongi, a few near Ikebukuro.
About 90% of them speak just a few Japanese phrases.
You will encounter them almost NOWHERE outside of big-city entertainment quaters.
“there ARE some Africans there...”
I was there years ago (staying at the New Otani) where both the SF 49er’s and the LA Rams were staying in preparation for a FB game in Yoyogi Stadium. I came down for breakfast with a sportscaster from the SF media and an elevator full or 300lb+ Black SF 49er linemen. When the door opened on the ground floor the little Japanese girl “greeter” bowed as the door opened then got this “holy $hit” look on her face as she looked up. I had several Japanese business associates ask me if “all Blacks” were that big!