Ryōō 陵王

Also Raryōō 羅陵王, Ranryōō 蘭陵王 (King Lanling), and Ryūō 龍王 (Dragon King, see *ryū 龍). A *bugaku 舞楽 dance and the mask *bugakumen 舞楽面 of a golden beast with a dragon perched on its head. Classification (for terms see bugaku): a dynamic dance hashirimai 走舞 of the Left sa-no-mai 左舞 originally from either Southeast Asia rin'yūgaku 林邑楽 or China tōgaku 唐楽 performed by one person dressed in a fringed tunic and pantaloons ryōtō shōzoku 裲襠装束.
According to some, the dance celebrates the victory of Prince Lanling also known as Changgung 長恭 of Pohai 北斉 (Manchuria) over the Zhou dynasty. Legends vary but either the handsome and kind prince donned the gruesome Ryōō mask himself and frightened his enemy into submission, or his father's ghost appeared wearing the mask. Others trace the dance back to Indian sources, either to the play Nagananda (Joy of the Serpents) or to images of Eight Dragon Kings hachidairyūō 八大竜王, especially Shagara or Sakara 沙羯羅. Following this tradition, folk festivals in Japan since the 13th century often incorporate the dance of Ryōō as a rain prayer, for dragons are associated with water and the east. This last function may account, in part, for the great popularity of the dance, which dates back to at least to the Heian period. The sharp nose, bulging, rotating eyes *dōgan 動眼 and gaping mouth with huge teeth and dangling chin *tsuriago 吊顎 are given a concentrated aggressive intensity by the wrinkles that line the face and the carved strands of heavy hair above the forehead. The gold face and metallic eyes are set off by the green hair and vermillion mouth. Tuffs of animal hair suggestive of eyebrows and moustache add an uncanny realism. On top perches a crouching dragon.
The dragons on top are of two kinds. Some, like the one on the late 12th-century Ryōō at Itsukushima Jinja 厳島神社 appear as separate figures seated on the head, with chest raised and limbs distinct. Many of these were carved separately and then attached to the mask. Other dragons, such as the one on the 13th-century Ryōō at Tsurugaoka Hachimangū 鶴岡八幡宮 in Kanagawa Prefecture, form an integral part of the mask, like an elaborate crown that is carved simultaneously with the face out of the same block.
A dry lacquer *kanshitsu 乾漆 Ryōō at Fujita 藤田 Art Museum in Osaka may well be the only 8th-century bugaku mask preserved today. Although damaged, it still retains the flavor of sculpture from the 8th century. Many of the 64 extant old Ryōō masks are preserved in the countryside and were made after the 13th century for folk festivals. Most have simplified constructions (e.g. no movable eyes) or carving. Some show a patternization and distortion of the original model, Tendaiji 天台寺 in Iwate Prefecture; Hakusan Jinja 白山神社 in Niigata Prefecture, while some have added elaborations such as sharp teeth set into the dangling chin, Ōboshi Jinja 大星神社 in Aomori Prefecture and metallic embellishments on the dragon, Tesshūji 鉄舟寺 in Shizuoka Prefecture.