Reog or Réyog (Javanese: ꦫꦺꦪꦺꦴꦒ꧀) is a traditional Indonesian dance in an open arena that serves as folk entertainment and contains some magical elements.

The city gate of Ponorogo is decorated with warok and gemblak, two characters who were present at the time when Reog is performed.

[1] On 3 December 2024, Reog Ponorogo performing art is inscribed on the UNESCO list of Intangible cultural heritage in need of urgent safeguarding.

[4] The dance describe Klono Sewandono the king of Ponorogo on his journey to Kediri to seek the hand of the Princess Songgo Langit.

Historians trace the origin of Reog Ponorogo as the satire on the incompetence of Majapahit rulers during the end of the empire.

Ki Ageng Kutu wrath against the corrupt behavior of his King, he saw that the powers of the Majapahit Kingdom soon will end.

In art performances Reog was shown the head of a lion-shaped mask called "Singo Barong", Kings of the forest that became a symbol of Kertabhumi, and it plugged up to peacock feathers to resemble a giant fan that symbolises the strong influence of the governing Chinese pronunciation of peers over all.

One of the requirement is abstinence, warok is prohibited to indulged and involved in sexual relationship with women, yet having sex with boy age eight to fifteen is allowed.

[10][11] Many Warok and Gemblak were massacred by Islamic groups during the anti-communist Indonesian killings of 1965-1966, their heads placed on pikes for public display.

Today the Warok-Gemblakan practice is discouraged by local religious authorities and being shunned through public moral opposition.

Reog National Festival is held every year along with the anniversary of Ponorogo regency and the Grebeg Suro celebration.

When carrying an adolescent boy or girl on his head, the Reog dancer holds weight of up to 100 kilograms in total.

Holding the heavy big mask by biting, the warok relies on the strength of his jaws, neck and shoulder muscles.