Araki is known for randomly dumping funfacts, trivia and all kinds of either useful or useless information into JJBA, yet I have not come across any page on the internet documenting each time this has happened.
So i will be doing that here.
From Part 1 to Part 9, let's all learn with Araki. The information he or the characters give isn't always correct but thats besides the point. My plan is to write down what, when and where in the manga it happened, link to the page (I don't have all the bandwith in The World) where it can be found and add a note if the information is correct or not, for the pretentious nerds like me out there.