The Three Corpses: Unlocking the Mystery of the Sanshi
Imagine if your body contained not just your soul, but three distinct, parasitic spirits waiting for you to fall asleep so they could betray you to the heavens. This is not the plot of a modern sci-fi thriller, but the premise of an ancient belief known as the “Three Corpses” (or Sanshi in Japanese).
Deeply rooted in Daoist philosophy and intricately woven into the fabric of Japanese folklore through the Koshin faith, the legend of the Three Corpses offers a fascinating glimpse into how ancient cultures viewed morality, health, and the quest for longevity. For the cultural traveler, understanding this concept unlocks the hidden meaning behind thousands of stone monuments scattered across Japan’s roadsides.
Origins of the Belief
The concept of the Three Corpses originated in China, dating back to early Daoist teachings. Known as Sanshi or the “Three Worms,” these entities were believed to reside within the human body. The primary textual source for this belief is the Baopuzi, written by the scholar Ge Hong in the 4th century CE, which details the methods for achieving immortality.
As Buddhism and Daoism traveled via the Silk Road and the Korean Peninsula to Japan, these beliefs were absorbed and adapted by the Heian aristocracy and later the common people. In Japan, this evolved into Koshin-shinko (Koshin faith), a unique syncretism of Daoism, Buddhism, and Shinto. While native Japanese mythology is recorded in texts like the Kojiki, the Three Corpses represent the continental influence that added a layer of moral surveillance to Japanese spiritual life.
The Legend of the Internal Spies
According to the legend, every human is host to three supernatural “worms” or spirit entities:
- The Upper Corpse (Peng Ju): Resides in the head. It causes blindness, hair loss, and mental decay.
- The Middle Corpse (Peng Zhi): Resides in the chest. It governs the five internal organs and incites cravings and bad eating habits.
- The Lower Corpse (Peng Jiao): Resides in the abdomen. It is associated with lust and vitality, attempting to drain the host’s life force.
The danger of these entities lies in their bureaucracy. According to the calendar, on the night of Koshin (the 60th day of the sexagenary cycle, known as the Day of the Monkey), the Three Corpses ascend to the heavens while the human host sleeps. Once there, they report the host’s sins and misdeeds to the Heavenly Emperor (Tentei). Based on the severity of the sins, the Emperor shortens the person’s lifespan.
To prevent this, people developed a counter-measure: The Koshin-machi (Koshin Vigil). The logic was simple—if you stay awake all night on the Koshin day, the Three Corpses cannot leave your body to make their report. By pulling an all-nighter, the faithful believed they could cheat death and ensure longevity.
Modern Culture & Symbolism
While the literal belief in internal worms has faded in modern Japan, the cultural footprint of the Three Corpses is massive, primarily visible through the iconography of the “Three Wise Monkeys.”
The famous “See No Evil, Hear No Evil, Speak No Evil” monkeys are directly linked to the Koshin faith. They were often carved onto Koshin-to (stone markers) to symbolically stop the Three Corpses from seeing, hearing, or speaking of the host’s sins.
In modern Japan, you will often find these stone slabs at old crossroads or within temple grounds. They usually feature the Blue-Faced Vajra (Shomen Kongo), a fearsome deity invoked to suppress the Three Corpses and protect the faithful during their long night vigils.
Traveler’s Tips
For travelers interested in Japanese folklore and history, hunting for traces of the Three Corpses adds a layer of depth to temple visits and rural walks.
- Spotting Koshin Stones: Look for stone pillars engraved with the kanji characters for Koshin (庚申). These are frequently found at older intersections in Kyoto, Kamakura, and rural hiking trails. They were placed there to protect travelers from evil spirits.
- Visit Shibamata Taishakuten (Tokyo): This temple is famous for its association with the Koshin day. If you visit on a Koshin day (which occurs every 60 days), you can witness special ceremonies that trace back to these ancient vigils.
- Yasaka Koshin-do (Kyoto): One of the most colorful spots in Kyoto, famous for its hanging “monkey” amulets (kukurizaru). This temple is dedicated to the Koshin faith and is a direct modern link to the struggle against the Three Corpses.
Sources & Further Reading
To dive deeper into the historical and spiritual context of the Three Corpses and Japanese mythology, consider exploring the following:
- The Baopuzi (Master Who Embraces Simplicity): Written by Ge Hong, this is the definitive Daoist text explaining the mechanism of the Three Corpses.
- Japanese Folk Religion Studies: While the Kojiki and Nihon Shoki cover the creation myths of Japan, look for academic commentaries on Koshin-shinko to understand how Daoist beliefs merged with the indigenous timelines.
- The Tale of Genji / Eiga Monogatari: While not religious texts, Heian-era literature often makes passing references to the superstitions and vigils aristocrats observed to maintain their health and status.