Actually if Kak reached his 40s, he would indeed be in the same timeline as FNAF(2010s). 40s Kak would absolutely pester Jotaro w the lore
Jotaro: (almost sleeping) hmm..
Kakyoin: Jotaro. Jotaro! (Tapping him on the shoulder) I heard you babbling over fish for all these years, you WILL hear me out on this!
Jotaro: ok babe go on about purple bitch
Kakyoin: he is a bitch so I'll let this one pass














