↓Skip to main content

The Head of Taira no Masakado: Tokyo’s Darkest Taboo - The Vengeful Spirit of Otemachi

This is no mere historical site. Even today, white-collar workers in Otemachi take care not to turn their backs to it, and construction workers tremble at the thought of disturbing it. It reigns as Japan’s ultimate “sacred sanctuary” and its “greatest taboo,” the pinnacle of urban legends in the heart of the megalopolis.

A stone monument between high-rise buildings.

1. The Myth of the “Flying Head”

Taira no Masakado was a hero of the mid-Heian period who led a rebellion in the Kanto region and declared himself the “New Emperor.” He was eventually defeated and beheaded in Kyoto. Legend says that on the third day of his head being displayed as a warning, it suddenly opened its eyes and cried out, “I’m going back to Kanto to find my body!” Before the eyes of the crowd, the head flew into the night sky.

The spot where the head supposedly fell and was buried is the current Otemachi location. Locals built a mound to soothe his powerful grudge. Since then, Masakado has been worshipped both as a guardian of Edo (Tokyo) and as its strongest, most dangerous vengeful spirit.

2. Realistic “Curses”: A History of Mysterious Deaths

The reason this legend feels chillingly real is the recorded history of “strange deaths” and “misfortunes” that have struck those who tried to remove or build over the site.

  • The Ministry of Finance Tragedy : After the Great Kanto Earthquake of 1923, the Ministry of Finance planned to build a temporary office on the site. Those involved in the construction suffered a string of deaths and injuries. Most notably, the Finance Minister, Seiji Hayami, died suddenly at the height of the project.

  • The GHQ Incident : After World War II, the American Occupation’s GHQ planned to turn the site into a parking lot. A bulldozer overturned during the leveling process, killing the driver. After several more unexplained accidents occurred nearby, the U.S. military immediately abandoned the plan.

  • Facing the Ghost : Rumors persist that workers in the surroundingyscrapers (such as the Mitsui & Co. Building) arranged their desks specifically so they would not sit with their backs to the Mound, out of respect and fear.

These are not just old superstitions. During the renovation of the mound from 2020 to 2021, priests performed elaborate ceremonies to ensure his spirit was not disturbed, and neighboring buildings reportedly took extreme care during the construction.

A massive phantom samurai over modern Tokyo.

Reflection: A Seal Named Prayer

The Mound of Masakado’s Head is an “irrational hole” in the heart of Tokyo’s rational megacity. While we immerse ourselves in smartphones and use the latest AI, we still bow our heads in fear of a thousand-year-old warrior’s grudge.

If you ever walk through Otemachi, look for this stone monument hidden between the buildings. You will feel a cold wind—a reminder of an indigenous spirituality and a primal fear of “curses” that no amount of technology or capital can ever fully conquer.