"Nio Kongōrikishi (金剛力士) or Niō (仁王) are two wrath-filled and muscular guardians of the Buddha, standing today at the entrance of many Buddhist temples all across Asia including China, Japan and Korea in the form of frightening wrestler-like statues. They are manifestations of the Bodhisattva Vajrapāṇi protector deity and the oldest and most powerful of the Mahayana pantheon."
Interesting, hindu influences in buddhism.