Tsurube-otoshiSevered Head Falling from Ancient Trees: Tsurube-otoshi

Academic Correction (Most Important Note for this Species): The monsters included in the "Mei" volume of Toriyama Sekien's *Konjaku Gazu Zoku Hyakki* (1779) are Nue, Itsumade, Jami, Moryo, Mujina, Nobusuma, Nozuchi, Tsuchigumo, Hihi, Dodomeki, Buruburu, Gaikotsu, Tenjo-sagari, Ohaguro-bettari, Okubi, Dodomeki, Kanedama, and Amanozako (18 entities in total), and Tsurube-otoshi is not included^[1]. What Sekien drew was the related yokai Tsurubebi, which was included in *Gazu Hyakki Yagyo* (1776) — the predecessor to Zoku Hyakki.

The original text for Tsurubebi is Yamaoka Genrin's *Kokon Hyaku Monogatari Hyoban* (published in 1686; the "Tsurube-oroshi of Nishinooka" tale in Nishiyama, Kyoto), which theorized the strange phenomenon of a large tree's spirit turning into a fireball and descending from the tree on rainy nights using the Five Elements theory (Wood generates Fire)^[2]. In other words, the "Yokai Tsurube-otoshi (a severed head or demon mask falling from a tree)" and "Sekien's Tsurubebi (a mysterious fire dropping from a large tree)" are separate lineages that diverged after the Showa era, and Sekien did not directly depict the former. No primary visual sources with the name "Tsurube-otoshi" from the Edo period exist, and it mainly appears as local folklore in Taisho period topographical records and folklore collections. This is a critical correction that must be specified to maintain the academic quality of yokai.jp, and the widespread "1779 Sekien iconification theory" should be explicitly denied.

The primary records of Tsurube-otoshi are Taisho period local materials and folklore collections^[3]. The Kyoto regional study *Kuchidanba Kohishu* (a Taisho era collection of folklore from Minamikuwada and Funai Districts) serves as the core historical document, recording it as a local legend of mountain roads, passes, and old trees in the Chubu and Kinki regions. The fact that the primary source is not Edo period iconography but local folklore oral collection is a unique characteristic of this yokai, making it an exceptional case that does not fit the generalization that "yokai originate from Edo period iconification."

The local folklore of Tsurube-otoshi is concentrated in the Chubu and Kinki regions^[4]: 1. Kyoto Prefecture — Hoki, Sogabe Village, Minamikuwada District (present-day Sogabe-cho, Kameoka City; drops from a kaya tree, laughs "Finished your night work? Shall I drop the bucket? Squeak, squeak" and rises again), Tera, Sogabe Village (a severed head descends from an old pine, devours people, and disappears for 2-3 days when full), Tomimoto Village, Funai District (present-day Yagi-cho, Nantan City; a pine tree covered in ivy), Tsuchida, Ooi Village (present-day Ooi-cho, Kameoka City; eats people) — documented in the Taisho period regional study *Kuchidanba Kohishu*. 2. Kuze Village, Ibi District, Gifu Prefecture (present-day Ibigawa-cho) — drops a bucket from a large tree that is dim even during the day. 3. Hikone City, Shiga Prefecture — drops a bucket from tree branches aiming at passersby. 4. Kuroe, Kainan City, Wakayama Prefecture — similar lore. 5. Tamba-Sasayama City, Hyogo Prefecture. 6. Mikawa mountainous region, Aichi Prefecture (folklore in Toyone Village, etc.). It has a geographic characteristic of concentrating around ancient trees (pine, kaya, cedar, zelkova) along mountain roads, passes, and shrine grounds in the Chubu and Kinki areas.

Its behavior is bifurcated by region^[5]: The Kyoto lineage is predatory (eating people and staying full for 2-3 days), making it a lethal yokai; the Gifu-Shiga lineage is intimidating (only dropping a bucket to scare people), causing little real harm. The Kyoto lineage features a specific predatory pattern of "not appearing for 2-3 days when satiated," and was feared as a murderous monster rather than a mere scarer. On the other hand, the Gifu-Shiga lineage, as its name suggests, simply drops a "tsurube (well bucket)" from a tree to startle people, a relatively harmless yokai positioned between a "supernatural threat" and a "laughing matter." Despite sharing the name "Tsurube-otoshi," the entity itself varies significantly depending on the region, providing an excellent example of the regional diversity of local legends.

The modern visual of a "red-faced, bearded, disheveled old man's head" depends heavily on Shigeru Mizuki's artwork and is not the original standard form in local folklore^[6]. The original form varies widely by region, splitting into three lineages: 1. A solitary severed head (Tera, Sogabe Village, Kyoto), 2. A formless monster that drops a well bucket itself (Gifu and Hikone, Shiga), and 3. A spirit type accompanied by laughter and speech (Hoki, Sogabe Village, Kyoto). The image of the "red severed head" was popularized through Shigeru Mizuki's manga and anime such as *GeGeGe no Kitaro* and *Akuma-kun*, becoming fixed as the modern general image, but from a folkloric perspective, the standard form changed pre- and post-Mizuki. This is also a perfect illustration of the decisive impact "Mizuki Yokai Culture" had on Japanese people's perception of yokai.

The idiom "autumn days drop like a tsurube" (a metaphor comparing the rapid darkening of the autumn sunset to the motion of a well bucket and rope plunging down at once) has no direct lineage connection to the yokai Tsurube-otoshi^[7]. They share the same metaphorical source of "a well bucket = something that falls rapidly," but the idiom was established independently as a meteorological expression. However, the fact that the concept behind the yokai's naming (the three elements of falling speed, darkness, and surprise) stands on the same metaphorical foundation as the idiom is noteworthy in cultural history — demonstrating the richness of Japanese metaphorical culture, where an everyday tool like a "well bucket" evolved into both a meteorological phrase and a yokai name.

Distinctions from similar yokai: 1. Tsurubebi (the mysterious fire dropping from a tree in Sekien's *Gazu Hyakki Yagyo*, which, as mentioned, is the Edo period origin lineage that diverged from Tsurube-otoshi in modern times), 2. Kodama (tree spirits in general; Tsurube-otoshi is an "individual monster dwelling in a specific ancient tree," a variant of the kodama lineage), 3. Kosoma (an acoustic supernatural phenomenon making axe and falling tree sounds in the mountains, different in nature from Tsurube-otoshi which primarily relies on visual dropping attacks), 4. Severed head lineages (Otoshikubi, Kubikireuma, etc.; they share the "head" aspect, but the Kyoto lineage's severed head in Tsurube-otoshi is an independent yokai entity, not a monster of decapitation).

Toriyama Sekien's four-part yokai series consists of *Gazu Hyakki Yagyo* (1776) -> *Konjaku Gazu Zoku Hyakki* (1779) -> *Konjaku Hyakki Shui* (1781) -> *Hyakki Tsurezure Bukuro* (1784), and all images are publicly available on the National Diet Library's NDL Image Bank. Tsurubebi is included in the "In" volume of *Gazu Hyakki Yagyo*. When listing Tsurube-otoshi on yokai.jp, it should be clearly stated that typeOfSource = "Local folklore (Chubu/Kinki)" and firstAttestedSource = Taisho period *Kuchidanba Kohishu*, while explicitly denying the widespread misinformation of the "Edo period Sekien iconification theory."

In modern yokai culture, it was popularized by Shigeru Mizuki's *Yokai Zukan* and the bronze statue on *Mizuki Shigeru Road* (Sakaiminato City, Tottori Prefecture), and appears as a Kyoto yokai in *GeGeGe no Kitaro* (3rd season VA: Masato Hirano, 5th season: Hisao Egawa) and *Nura: Rise of the Yokai Clan*. As an excellent example of a grassroots yokai originating from local oral tradition being popularized by Shigeru Mizuki's artwork, Tsurube-otoshi is an important case study showing the modernization mechanism of Japanese yokai culture — a fascinating yokai situated at the intersection of folklore studies, art history, and media theory, demonstrating a modern yokai circulation route from unillustrated Edo period local folklore to Taisho period oral collection, Mizuki's popularization, and modern anime and games.