It is vital to note that these are performed by licensed actors. The "Japanese Father-in-Law" is a fictional character archetype, similar to a villain in a horror movie. The actors who play these roles (like Hiroshi Kanno) are reportedly very polite and professional off-screen.
Creators living in Japan often document their real-life relationships with their Japanese in-laws. Popular videos, such as Japanese Father In Law Sex Videos %21EXCLUSIVE%21