Many people consider the Japanese regions of Iga and Koga to be the birthplace of the shadow-like, secretive ninja, who belonged to the ruling clans there. These mercenaries fought for whichever master paid them the most, often working for someone they were hired to attack a couple of years earlier. Knowledge of how to infiltrate castles and other stealthy skills were passed on from father to son, and it was known that the best ninja were from Iga and Koga. The city of Iga-Ueno in the Iga area boasts the Hakuhojo White Phoenix Castle, also known as Ninja Castle. It has a ninja museum, complete with ninja weapons, costumes and demonstrations of ninja attacks. In addition, every April the city hosts a ninja festival with events and parades.
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