Forgotten History: The Untold Story Of The Joestar Birthmark
We only ever see josefumi's birthmark in the very first panel in which he appears. There are some other panels where you can sort of see his shoulder and you would think that the birthmark. The birthmark only appeared after dio awakened his stand, thus awakening those of the other joestars. This explains why jotaro and holly never noticed their birthmark, and also why it.
