Board Thread:General Discussion/@comment-25230331-20150926032531/@comment-1739368-20151020105435

Alot of people are also ignorant to banchou attire. On the other hand,  Jotaro's hat is the only banchou hat with a button in the middle AND the hand symbol to the right (though in this case it's more of a square), so it's likely this is indeed a reference to Jotaro's hat.

Example of generic bancho hat: http://img.gamefaqs.net/box/1/1/5/73115_front.jpg

Jotaro's specifically: http://071bc3d04e2671665c74-5a267f839fbe60d0845a37698418bb02.r26.cf5.rackcdn.com/wp-content/uploads/2014/04/jojos-bizarre-adventure-all-star-battle-jotaro-kujo-face.jpg

I'd say it's alright to add.