Hyakki Yagyō

Lore & Background

Over more than one thousand years of history, a great deal of folklore has developed around the Hyakki Yagyō, making it difficult to isolate any canonical meanings. One legend states that every year the yōkai Nurarihyon leads all yōkai through the streets of Japan during summer nights. Anyone who comes across the procession would perish or be spirited away unless protected by exorcism scrolls handwritten by Onmyōji spell-casters; only an onmyōji clan head is strong enough to pass unharmed. Another account in the medieval encyclopedia Shūgaishō says safety requires staying inside on specific nights associated with the Chinese zodiac or chanting a specific magic spell.

Reader's Guide

The Hyakki Yagyō has been a popular theme in Japanese visual art and literature for centuries. One of the oldest and most famous artistic examples is the 16th-century handscroll Hyakki Yagyō Zu, erroneously attributed to Tosa Mitsunobu, located in the Shinju-an of Daitoku-ji, Kyoto. Other picture scrolls, such as the Hyakki Yagyō Emaki from the Muromachi period, contain details of each member in the parade. Notable later works include those by Toriyama Sekien (Gazu Hyakki Yagyō) and Utagawa Yoshiiku, though Toriyama's work presents yōkai in separate encyclopedic entries rather than assembled in a parade, while Utagawa's Kokkei Wanisshi-ki uses the theme to comment on contemporary Japanese military actions in China. In literature, the Hyakki Yagyō appears in tales collected by Japanese folklorists, including the Uji Shūi Monogatari, where a monk encounters a hundred yōkai at Ryūsenji temple, and the Konjaku Monogatarishū, which recounts a minister's son seeing a hundred demons that flee upon noticing his attire with sonjoushi written on it.

Did You Know?

• The Hyakki Yagyō is sometimes an orderly procession and other times a riot.
• One legend says Nurarihyon leads all yōkai through Japan during summer nights.
• The Shūgaishō encyclopedia prescribes staying inside on Chinese zodiac nights or chanting a specific spell for safety.
• The 16th-century handscroll Hyakki Yagyō Zu is erroneously attributed to Tosa Mitsunobu.

The Concept and Cultural Resonance

Hyakki Yagyō, literally translated as the Night Parade of One Hundred Demons (and sometimes rendered Hyakki Yakō), stands as one of Japanese folklore's most enduring idioms. At its core, the concept depicts a vast nocturnal march of supernatural beings—oni and yōkai numbering in the thousands—sweeping through the streets of Japan after dark. What makes the image so compelling is its inherent duality: the procession can be rendered as a disciplined, orderly column or as a chaotic, rioting horde, and the tradition has never settled on a single canonical interpretation. Over more than a millennium of storytelling and artistic production, the motif has accumulated layers of meaning that resist neat definition. Scholars and folklorists have noted that the Hyakki Yagyō functions much like the English word pandemonium—a terrifying rupture in which the supernatural world spills violently into the mundane—though the two concepts are not perfectly interchangeable. The idiom's longevity and its constant presence in both oral narrative and visual culture have made it a foundational image in the Japanese imagination of the uncanny.

Legends and Protective Measures

Among the many legends that have grown around the night parade, two stand out for their vivid specificity. A more recent tradition holds that the yōkai leader Nurarihyon annually commands the full host of supernatural creatures to sweep through Japanese streets on summer nights. The fate of any mortal who stumbles upon this procession is dire: death or abduction by the yōkai. The sole protection comes from exorcism scrolls personally handwritten by Onmyōji spell-casters, and even then, only a clan head of sufficient spiritual power is said to be able to walk through Nurarihyon's parade unscathed. A far older account, preserved in the medieval encyclopedia known as the Shūgaishō, offers a different safeguard. According to this text, a household threatened by the parade on a particular night tied to the Chinese zodiac calendar could either remain sealed indoors or recite a specific incantation—KA-TA-SHI-HA-YA, E-KA-SE-NI-KU-RI-NI, TA-ME-RU-SA-KE, TE-E-HI, A-SHI-E-HI, WA-RE-SHI-KO-NI-KE-RI—to ward off the demons entirely.

Literary Appearances

The Hyakki Yagyō left a deep imprint on Japanese literary tradition, surfacing in multiple collections gathered by folklorists over the centuries. In the Uji Shūi Monogatari, a monk witnesses a procession of exactly one hundred yōkai drifting past the Ryūsenji temple, an encounter that blurs the boundary between sacred ground and supernatural intrusion. The Konjaku Monogatarishū preserves a tale set during the Jōgan era (859–877), in which the eldest son of a Fujiwara minister, traveling to visit his lover, spots a hundred demons advancing from the direction of the main street. His salvation comes not from a spell but from his clothing: the sonjoushi inscribed on his attire is spotted by the demons, who flee in panic. Beyond these two well-known narratives, the motif also appears in the Ōkagami, the Gōdanshō, the Kohon Setsuwashū, and the Hōbutsushū, each collection adding its own variation to the shared image of a demon host moving through the night. Together these texts demonstrate how the night parade served as a flexible narrative device across different periods and genres of Japanese storytelling.

Artistic Legacy

Few motifs in Japanese visual culture have been as consistently revisited as the night parade. One of the oldest and most celebrated examples is a sixteenth-century handscroll titled Hyakki Yagyō Zu, housed in the Shinju-an at Daitoku-ji temple in Kyoto; it is traditionally but erroneously attributed to the painter Tosa Mitsunobu. Another significant work, the Hyakki Yagyō Emaki, dates to the Muromachi period and is notable for cataloguing the individual members of the parade in meticulous detail. The motif continued to inspire artists well into the Edo period. Toriyama Sekien's Gazu Hyakki Yagyō takes a distinctly different approach, presenting each yōkai as a separate encyclopedic entry rather than assembling them into a single marching column. Utagawa Yoshiiku, meanwhile, deployed the hundred-demon framework in his Kokkei Wanisshi-ki, a satirical work subtitled Comical Record of Japanese History, using the parade as an allegorical lens to critique contemporary Japanese military actions in China. These varied treatments show how the night parade could function as pure spectacle, scholarly taxonomy, or political commentary.