The Kami "Susanowo" was banished from Takama-ga-hara, and had his power sealed in the five "Bujingi".
(Wikia editor's note: "Kami" is the Japanese word for god.)
There was once a Kami, "Bujintei Susanowo", who once dwelled in the heavenly realm of Takama-ga-hara, alongside many other Kami. He possessed incredible power, power so great that many began to plot and scheme against him. This cast suspicion on him, causing him to ultimately incur the wrath of the Supreme Kami. He was banished to the surface and his power was sealed inside the five "Bujingi".
|"Susanowo", along with his "Bujingi", was cast down to the surface by the hand of the Supreme Kami.|
Searching for the "Bujingi" that fell to the surface with him, "Susanowo" renamed himself "Yamato", and began a journey.
Having lost most of his power, "Susanowo" began to refer to himself as "Bujin Yamato", and set out on a journey to find the five "Bujingi" and regain his true power. Over the course of his journey, he witnessed people on the surface suffering from the tyranny of the gods and acted on it, strengthening the suspicions of the Kami dwelling in Takama-ga-hara, including the Supreme Kami.
Having found the five "Bujingi", "Yamato" regained his true strength, that of "Bujintei Susanowo"!!
Having found the five "Bujingi" after a long journey, he reclaimed his true form, that of the strongest Kami in existence: "Susanowo". But, not to be trapped by himself, he swore an oath to continue his journey, traveling the entire world, and wherever there was evil, wherever an innocent would suffer, he would be there to lend a hand, while determined to one day reascend to Takama-ga-hara!!
Another "Bujintei" came to the surface, chasing after "Susanowo"
"Bujintei Kagutsuchi" was worried about his sworn friend, "Susanowo", who had been exiled to the surface, and decided to find out the truth. However, because there were restrictions on who from Takama-ga-hara could go to the surface, he sealed the power of his body into 4 Bujingi to hide that he was a Kami, and went by the alias "Mikazuchi".
"Kagutsuchi" lends "Susanowo" a hand against Takama-ga-hara
Mikazuchi, expecting a pleasurable jaunt, instead found the surface plagued and ruined by the acts of the Kami. Incapable of accepting what was going on, he pleaded with Susanowo to tell him what was going on. He then rose to Takama-ga-hara with "Susanowo" in order to learn the truth, recalling sights he had seen on the surface!