Little Garden

The Miniature Garden is the world where Izayoi Sakamaki, Asuka Kudō, and Yō Kasukabe enter when they are summoned by Black Rabbit. It's also known as the "Little Garden". Jin Russell also states that the surface area is comaparable to that of a star. To see the Garden's gates, please visit here.

Background
The Miniature Garden has 7 layers or gates that make up its world. As stated by Black Rabbit and Shiroyasha in Episode 2 - Seems Like a Crazy Loli Clad in Japanese Clothing?, the closer one lives to the center or gate number 1, the stronger they are. The red circle indicates the part closest to the center and where the strongest communities reside.

And from the circles, it is further divided into four sectors: The Great River Tritonis divides the world of Little Garden into 8 parts and flowed off the steep cliff side called the [Edge of the World].
 * North Side
 * East Side
 * South Side
 * West Side

Known Communities
The list below lists all the communities that has been mentioned in the anime. The list below are after the anime, in the light novels
 * No Name Community  - 7-Digit #2105380, has 6 digit land
 * Fores Garo Community - Disbanded
 * Thousand Eyes Community - 4-Digit # 3345
 * Perseus Community - Assumed to be 4-Digits
 * Salamandra - 5 digit
 * Rattenfänger - 6 digit
 * Will-O-Wisp - 6 digit # 678900
 * Grim Grimore
 * 666 Beasts - 3 digit # 666
 * Draco Greif Alliance - 5 digit
 * Maxwell
 * Ouroboros Demon Lord Alliance
 * Evil Aksara - 3 digit
 * One Horn - 5 digit
 * Two Wings - 5 digit
 * Three Tails
 * Four Footed
 * Five Claws
 * Six Scars

Known Alliances

 * OniHime Alliance of the West
 * Ouroboros Demon Lord Alliance
 * Draco Greif Alliance
 * Alliance of th NoName, Perseus, Six Scars and Will-O-Wisp