The Naki Sumo Crying Baby Festival is an annual Japanese festival in which babies are held in the arms of sumo wrestlers in an open-air sumo ring. Two babies compete in a short match in which the first child to cry is proclaimed the winner. According to Japanese folklore, a crying baby has the power to ward off evil spirits, while a strong, loud cry indicates the child will grow up strong and healthy. The Naki Sumo Festival has been held throughout Japan for over 400 years. The festival is considered to have origins in the folk belief that the loud cry of an innocent baby has the power to ward off demons or evil spirits. The Japanese proverb naku ko wa sodatsu, meaning "crying babies grow fastest", is an additional source of inspiration for the festival. The Naki Sumo Festival is held annually at Shinto shrines throughout Japan, most commonly on or around May 5 to coincide with Children's Day at the end of the Golden Week holiday. The specific customs and traditions of each festival vary by location, but the main focus of every festival is a ritualistic prayer for the good health of each baby and a competition between infants held in a sumo wrestling ring. A Shinto priest opens each festival with rituals to pray for the healthy growth of each baby. The staff at the shrine hand-make four-pronged kabuto helmets for each participant to wear during the crying competition and create commemorative gifts and souvenirs for the parents. Next, the crying baby competition is held outdoors in a handmade sumo ring. Two babies at a time compete in short matches, while held in the arms of professional or student sumo wrestlers. The first child to cry is declared the winner and bestowed with a blessing of good health. If both children cry simultaneously, the baby with the louder or longer cry is typically the victor. Sumo wrestlers employ a variety of techniques to encourage crying, including bouncing the baby in their arms, making loud noises and funny or scary facial expressions, and chanting "Naki! Naki! Naki!" ("Cry! Cry! Cry!" in English).