When Takeru Yamato finds a mysterious rock, it transforms him into the hero Yatsurugi. Now he fights to protect the town of Kisarazu from the forces of evil.

After 30 years of peace is Kisawazu, the Eight Swords of Sealing are scattered from the Yatsurugi Shrine once more. This even reawakens the Undersea Empire Zabun, who plan on finding the swords and using them to reawaken their master King Orga. As well as them, the mystical embodiment of the phoenix, Yatsurugi, arrives and merges with Takeru Yamato, a young fisherman and regular visitor to the shrine. Now with this new power, Yatsurugi, and eventually the similar deity Kisara, come forth to stop the unsealing of King Orga and return the Swords to the Shrine, as had been done for many generations before them.

Houjin Yatsurugi (Houjin Yatsurugi) is a Local Hero production and the first production made by the independent studio Yatsurugi Tamashii, as well as the first in the Yatsurugi franchise. This series set in stone the company due to it's surprising popularity, eventually leading them to be the most popular and well known independent Tokusatsu studio.