Oni no Kuni
The Country of Demons (Oni no Kuni) is a far off country located on another continent apart from the Five Great Shinobi Countries. It is located on the same continent as Numa no Kuni, with a few minor countries separating the two. The country's highest priestess is known for two skills passed down through the ages; she can predict someone's death and seal away demonic entities. It is said that the priestess' primary role is to protect the sealed soul of the demon Mōryō's, whom is imprisoned here. The two most famous techniques that are passed down in this country, the Shrine Seal and the Shadow Mirror Body Changing Method, seem to use hand seals that are completely different from the standard twelve. This indicates that these foreign lands may have an entirely different form of ninjutsu unknown to those that live on our own continent.
Oni no Kuni
Politics
Not much is known about the political state of Oni no Kuni aside that the center of government appears to be the Priestess of the country.
Economy
Not much is known about the economic state of Oni no Kuni.
Demography
The demographics of Oni no Kuni are believed to be homogenous as the country has tight laws about immigration and travel. Their borders often remain close, and those that live there do not often venture out unless turned away from society.
Culture
Not much is known about the culture of Oni no Kuni.
Architecture The architecture of Oni no Kuni has traditionally been typified by wooden structures, elevated slightly off the ground, with tiled or thatched roofs. Sliding doors (fusuma) were used in place of walls, allowing the internal configuration of a space to be customized for different occasions. People usually sit on cushions or otherwise on the floor, traditionally; chairs and high tables are not widely used.
Cuisine The food of Oni no Kuni is a mixture of seafood as well as rice farming and occasional beef. The country is blessed with large fields of land perfect for raising livestock and farming. Fried foods are a scarcity, most of their food is cooked in pots with water or grilled over fires.
Geography & Climate
The geography of Oni no Kuni is relatively flat forests and farm fields with ranges of mountains that barely rise high enough to be called so. The country has a typical inland climate gives large temperature variations between summers and winters and between days and nights. Precipitation is lower in the center than on the coast due to rain shadow effects. Most would consider the country to be 'moderate'.
Mōryō's Spirit Seal
A large stone building whose interior opens up into a seemingly natural cavern. Part of the Ghost Army is sealed within pits around the center. Numerous ropes with what appear to be paper seals hang around across the cavern. At its center is a shrine like structure surrounded by five pillars, a large emblem made of light illuminating it from above. According to lore, the chamber where Mōryō's soul is sealed is another realm separated from that of the living, and only one who bears the name "Yomi" (黄泉, Literally meaning: underworld), can enter. The entrance is guarded by soldiers year round.
Priestess' Compound
A large building not unlike a temple complete with torii. It is where the Priestess of the country lives, guarded by countless soldiers. In the event of attack, there is a secret passage leading from the back wall of the Priestess' room to a waterfall behind the compound, which then appears to go further through the waterfall to an unknown location.