Izumo Province in the context of "Matsue Castle"

Susanoo (スサノオ, Japanese pronunciation: [sɯ̥.sa.noꜜː]; historical orthography: スサノヲ, 'Susanowo'), often referred to by the honorific title Susanoo-no-Mikoto ([sɯ̥.sa.noꜜː no mʲi.ko.to]), is a kami in Japanese mythology. The younger brother of Amaterasu, goddess of the sun and mythical ancestress of the Japanese imperial line, he is a multifaceted deity with contradictory characteristics (both good and bad), being portrayed in various stories either as a wild, impetuous god associated with the sea and storms, as a heroic figure who killed a monstrous serpent, or as a local deity linked with the harvest and agriculture. Syncretic beliefs of the Gion cult that arose after the introduction of Buddhism to Japan also saw Susanoo becoming conflated with deities of pestilence and disease.

Susanoo, alongside Amaterasu and the earthly kami Ōkuninushi (also Ōnamuchi) – depicted as either Susanoo's son or scion depending on the source – is one of the central deities of the imperial Japanese mythological cycle recorded in the Kojiki (c. 712 CE) and the Nihon Shoki (720 CE). One of the gazetteer reports (Fudoki) commissioned by the imperial court during the same period these texts were written, that of Izumo Province (modern Shimane Prefecture) in western Japan, also contains a number of short legends concerning Susanoo or his children, suggesting a connection between the god and this region.

Kinai (畿内; Japanese pronunciation: [kʲiꜜ.nai]) is a Japanese term denoting an ancient division of the country. Kinai is a name for the ancient provinces around the capital Nara and Heian-kyō. The five provinces were called go-kinai after 1760.

The name is still used to describe part of the Kansai region, but the area of the Kinai corresponds only generally to the land of the old provinces.

San'indō (山陰道; Japanese pronunciation: [saɰ̃.iꜜn.doː]) is a Japanese geographical term. It means both an ancient division of the country and the main road running through it. San'in translates to "the shaded side of a mountain", while dō, depending on the context, can mean either a road, or a circuit, in the sense of delineating a region. This name derives from the idea that the northern side of the central mountain chain running through Honshū was the "shaded" side, while the southern side was the "sunny" (山陽 San'yō) side. The pre-modern region corresponds for the most part with the modern conception of the San'in region.

The region was established as one of the Gokishichidō (Five provinces and seven roads) during the Asuka period (538–710), and consisted of the following eight ancient provinces: Tanba, Tango, Tajima, Inaba, Hōki, Izumo, Iwami and Oki. However, this system gradually disappeared in the centuries leading up to the Muromachi period (1333–1467).

Ōkuninushi (大国主（おおくにぬし）; historical orthography: オホクニヌシ, 'Ohokuninushi'), also known as Ō(a)namuchi (Oho(a)namuchi) or Ō(a)namochi (Oho(a)namochi) among other variants, is a kami in Japanese mythology. He is one of the central deities in the cycle of myths recorded in the Kojiki (c. 712 CE) and the Nihon Shoki (720 CE) alongside the sun goddess Amaterasu and her brother, the wild god Susanoo, who is reckoned to be either Ōkuninushi's distant ancestor or father. In these texts, Ōkuninushi (Ōnamuchi) is portrayed as the head of the kunitsukami, the gods of the earth, and the original ruler of the terrestrial world, named Ashihara no Nakatsukuni (葦原中国, the "Central Land of Reed Plains"). When the heavenly deities (amatsukami) headed by Amaterasu demanded that he relinquish his rule over the land, Ōkuninushi agreed to their terms and withdrew into the unseen world (幽世, kakuriyo), which was given to him to rule over in exchange. Amaterasu's grandson Ninigi then came down from heaven to govern Ashihara no Nakatsukuni and eventually became the ancestor of the Japanese imperial line.

Ōkuninushi is closely associated with the province of Izumo (modern Shimane Prefecture) in western Japan; indeed, the myth of his surrender to the gods of heaven may reflect the subjugation and absorption of this area by the Yamato court based in what is now Nara Prefecture. Aside from the Kojiki and the Shoki, the imperially-commissioned gazetteer report (Fudoki) of this province dating from the early 7th century contain many myths concerning Ōkuninushi (there named 'Ōanamochi') and related deities. Myths which feature Ōkuninushi (or deities equated with him) are also found in the Fudoki of other provinces such as those of Harima (modern southwestern Hyōgo Prefecture). He is also known for his romantic escapades with a number of goddesses which resulted in many divine offspring, including the gods Kotoshironushi and Takeminakata.

Iwami Province (石見国, Iwami no Kuni; Japanese pronunciation: [iꜜ.wa.mʲi (no kɯ.ɲi)]) was an old province of Japan in the area that is today the western part of Shimane Prefecture. It was sometimes called Sekishū (石州). Iwami bordered Aki, Bingo, Izumo, Nagato, and Suō provinces.

In the Heian period (794–1192) the capital was at modern-day Hamada. In the Kamakura period (1192–1333) the Masuda clan belonged to the Minamoto clan (Genji) and conquered Iwami Province. From the sixteenth century onwards, it played an important role in East Asia's economic history as a major silver source.

Ame no Hohi (天菩比神, 天穗日命,アメノホヒ, "Heavenly grain sun"), also known as Ame no Fuhi (天乃夫比, アメノフヒ) is a male deity and the second son of sun goddess Amaterasu in Japanese mythology. Izumo no Kuni no Miyatsuko or the historical rulers of Izumo and modern heads of Izumo-taisha and Izumo-taishakyo descend from him.