Batman w/prep Vs. Kenshiro [Fist of the North Star; unarmed]
Batman gets 3 days to watch videotaped footage of Kenshiro's fighting style in action. He can not use his prep time to create or acquire any type of technological or tactical implement, it's simply time in order for him to study his opponents fighting style and become acquainted with it.
Kenshiro comes to Gotham, unarmed, and Batman confronts him. Kenshiro has no prior knowledge of Batman's fighting style, the number of martial arts disciplines Batman has mastered, or the arsenal within Batman's utility belt (Batman has his standard night patrol implements).
Battle takes place at 1am, beginning in the streets of Gotham. Free range battle within city limits, but Batman can not use vehicles or any weapons not already in his standard arsenal.
Who wins?
Discuss.