Yamata no Orochi is a gigantic serpent with eight heads and eight tails. It has bright red eyes and a red belly. The beast is so large that its body covers the distance of eight valleys and eight hills. Fir and cypress trees grow on its back, and its body is covered in moss.

Yamata no Orochi appears in the earliest written Japanese documents, the Kojiki and the Nihongi. Without a doubt, the legend goes back even farther into pre-history.

Ages ago, the storm god, Susanoo, was thrown out of heaven and descended to earth at Mount Torikama near the Hi River in Izumo Province. There, he came upon an elderly couple of gods named Ashinazuchi and Tenazuchi, who were weeping. When Susanoo asked why they were crying, they explained that they once had eight daughters, but every year the eight-headed-eight-tailed serpent Yamata no Orochi demanded one as a sacrifice. They were now down to their eighth and final daughter, Kushinada hime. Soon it would be time for Yamata no Orochi to demand a sacrifice.

Susanoo explained that he was the elder brother of the sun goddess Amaterasu, and offered to slay the beast in return for Kushinada hime’s hand in marriage. The elderly couple agreed, and Susanoo set in motion his plan to defeat the serpent.

First, Susanoo transformed Kushinada hime into a comb, which he placed in his hair. Then, he had Ashinazuchi and Tenazuchi build a large fence with eight gates. On each gate they raised a platform and on each platform they placed a vat. They poured extremely strong sake into each vat. When this was finished, everyone waited for the serpent to arrive.

When Yamata no Orochi appeared, the great serpent slithered into the fence and noticed the powerful sake. It dipped its eight heads into the vats and drank the alcohol. Soon, the monster fell into a deep, drunken sleep. Susanoo used this chance to make his attack. He sliced the enormous beast into tiny pieces with his sword. The carnage was so great that the Hi River flowed with blood. When Susanoo had cut the creature down to its fourth tail, his sword shattered into pieces. Examining the part of Yamata no Orochi’s tail which broke his sword, Susanoo discovered another sword within the creature’s flesh: the legendary katana Kusanagi no Tsurugi.

Susanoo eventually offered Kusanagi as a gift to his sister, Amaterasu, and was allowed to return to heaven. The sword was passed down through the generations in the imperial line of Japan. It is one of the three pieces of imperial regalia, along with the mirror Yata no Kagami and the jewel Yasakani no Magatama. Today, the sword which came from Yamata no Orochi’s tail is said to be safeguarded in the Atsuta Shrine in Nagoya.