The Deep Religious History of the "Misaki" Concept. While the basic overview touches upon the distribution of Shichinin Misaki, this deep dive explores the religious and historical undercurrents of the term "Misaki" itself. Written in kanji with characters meaning "vanguard" or "cape," "Misaki" originally denoted a divine attendant acting as the "herald or vanguard of a primary deity" in ancient Japan. Entities like the Kumano Misaki and Inari Misaki were recognized as orthodox heralds in shrine rituals. The folkloric evolution of this concept—transforming into "possessing collective spirits that cause illness" in the folk beliefs of western Japan—is profoundly fascinating. The shift in meaning from "herald gods" to "cursing collectives" physically embodies the historical stratification of ancient Ritsuryo-system Shinto, medieval Goryo (vengeful spirit) worship, and early modern folk belief.

Global Comparison of Collective Spirits. "Multiple spirits acting collectively" like the Shichinin Misaki have parallels worldwide. The Lemures of ancient Rome (spirits appeased during May festivals), the Erinyes of ancient Greece (the three Furies), the Draugr hordes of Norse mythology, the "Yexing Shen" (Night-walking gods) of China, and the "Chilseong Shin" (Seven Star Gods) of Korea show that collective spirit lore developed globally from antiquity through the Middle Ages. However, the "fixed-number reincarnation structure" of Shichinin Misaki is structurally aberrant. It surpasses simple ghost stories, embodying an ancient societal imagination regarding the "eternal exchange between the dead and the living," making it a highly significant subject for comparative religious studies.

Sengoku Samurai Tragedy and Spectral Transformation. The most famous lineage of Shichinin Misaki—the tragedy of Lord Kira Chikazane and his retainers—is the ultimate expression of collective suicide, martyrdom, and the lord-vassal bond among Sengoku-era samurai. Chikazane's forced seppuku after angering Chosokabe Motochika is a textbook case of "internal clan strife over succession, purging by a lord's wrath, and the martyrdom of retainers." The structure of "a lord and his seven men sharing their fate" encapsulates the essence of Japanese samurai ethics. The continuation of this bond after death as a collective spirit reveals how folkloric imagination repurposed the extreme tragedy of Sengoku samurai society into post-mortem grudges.

The Magic of Hiding Thumbs: East Asian Funerary Rites. The defensive spell against Shichinin Misaki—"hiding the thumbs inside the fists"—is an ancient physical reflex common across East Asian (China, Korea, Japan) funerary and magical cultures. It was believed that in places heavily associated with death (funeral processions, graveyards, night roads, crossroads), evil spirits could invade the body through the thumbnails (ancient Japanese believed the soul resided in the nails). This reflects a shared ancient East Asian view of the body, where "the thumb is the center of the body and the seat of the soul." This connection proves that "Shikoku yokai legends" are not isolated provincial folklore, but vital research materials inextricably linked to the broader East Asian religious network.

Medieval Goryo Worship and the Uniqueness of Western Japan. The structure of pacifying collective spirits, building shrines for them, and inheriting their rituals is seen throughout medieval Japan. So why did it develop so strongly in western Japan (Shikoku, Chugoku, Seto Inland Sea, northern Kyushu)? During the Heian and medieval periods, western Japan was the hub of maritime trade with the Korean Peninsula and the continent, making it a cultural sphere heavily infused with continental Daoism, Buddhism, and folk beliefs. Furthermore, as the periphery of the central court (Kyoto/Nara) dominated by aristocrats and elite monks, regional adaptations of Goryo worship, magic, and festivals thrived. The concentration of collective spirit lore like Shichinin Misaki in western Japan reflects this ancient and medieval cultural and religious geography.

Natsuhiko Kyogoku and Modern Yokai Literature. Natsuhiko Kyogoku's *Jorougumo no Kotowari* (1996) reconstructs the collective spirit lore of western Japan as modern mystery, folkloric critique, and philosophical inquiry. Through his protagonist Akihiko Chuzenji (an antiquarian bookseller, Shinto priest, and folklorist), Kyogoku decodes Shichinin Misaki using modern perspectives: "yokai as the shadow of the mind" and "collective spirits as communal memory." As the flagship example of how post-war literature and modern horror reconstruct historical folklore with academic rigor, Shichinin Misaki—fueled by Komatsu's Goryo research and Kyogoku's literary decoding—remains a core engine driving 21st-century yokai studies.

Shichinin Misaki in the 21st Century: Tourism and Academia. Today, Shichinin Misaki is actively sustained through Kochi tourism, the Shikoku Pilgrimage, paranormal media, and local history research. Kira Shrine and the memorial towers of Chikazane and his retainers are preserved as local cultural assets, spotlighting the "Shichinin Misaki of Tosa" as a representative folk heritage of Shikoku. Simultaneously, at the intersection of folkloric research and modern pop culture, they survive as "active" folkloric entities. It is one of the few collective spirit legends carrying a five-fold cultural lineage: Sengoku samurai tragedy → Medieval Goryo worship → Early modern folk belief → Modern tourism/literature → Academic research.