Here’s a fun position, not quite bent four, but pretty closely related:
What is best play for black/white playing first under chinese rules?
(I have no idea about japanese rules, maybe @yebellz can analyze that for us!)
Although the position is presented on a compact small board here, it does not in fact rely on the two groups being adjacent (at least in chinese rules). This sort of situation could happen in a normal 19x19 game, but I don’t know of any examples from real games.