Punisher #22 Marvel Comics (1987)

The Punisher is reacquainted with fear when he meets the heir of the last true ninja in an underground training camp!

Tracking a women who poisoned a boxing champion causing him to lose his fight takes Castle to Kansas. The leads take him to a Ninja Training Camp that is not what it seems. The Punisher investigates the camp to try and find clues about the women he is tracking. After arriving he runs into another mysterious woman with her own agenda.