Here's a really disturbing episode of "Ganso Tensai Bakabon" (The Original Genius Bakabon). The premise is that Bakabon's Papa has a friend he's known for 30 years, but not once did he ever saw his face. He decides to make it his goal to see it once and for all. It goes from bad to worse in the end.
Produced by TMS in the mid-1970s.