The stage changes its appearance every game and it is most likely because there are actually several Japanese colonies in the world. The stages usually feature Japanese architecture and people with their traditional clothing.
The Japanese lived the colonies after Japan was destroyed by Justice. The United Nations forbid the Japanese to leave the colonies and the ones who escape became bounties. They are forced back into the colonies sealed by a magic barrier. Ky Kiske, an IPF officer was able go into a colony only after releasing the seal, implying that Japanese colonies are also not accessible to the average person.
The Guilty Gear Xtra Manga is mostly set in a Japanese Colony. The main female character Mizuha and her grandfather lives there and encounters the main hero, Tyr. The two later met Ky Kiske who was in the colony for an investigation over the awakening Gears and the reacting Sacred Treasures.
The original Colony stage is Baiken's battleground in Guilty Gear, it seemingly has a dirt floor, with two traditional Japanese trees on either side of it. A pagoda-style building stands above a rocky foundation on the left side, and a statue of what appears to be a skeleton in festive clothing besides it. Two giant ropes surround the monument, one coming from the pagoda and one from unseen place, tying up in a large pillar behind yet another, smaller pagoda on the right corner. The stage is set at night, and a bright shinning moon stands above the smaller pagoda in the sky.
Guilty Gear X features a wholly different scenery. A wooden floor transitioning into white cobblestone marks the fighting ground. A traditional Japanese building has it entrance in the right side of the floor, artworks adorn it's walls. The figure of a tiger is the closest and most identifiable one. What appears to be a mailbox stands on the wooden part of the floor, and in the cobblestone path a small statue of an oni-like figure stands right beside a traditional Japanese gate, the kanji 寿 (kotobuki; "longevity") written on it. A stairway leading to off-screen is all after it, and thick leaves right behind the path. At the background, some sort of wooden pathway, filled with similar gates to the one closer to ground, is suspended high above the air by wooden beams far away, and a gigantic statue of a muscular, long-haired male figure up closer. The stage is set at sunset, giving it an orange tint; along with falling leaves, the stage gives off an autumn-esque feel.
Guilty Gear XX features the stage yet again, only at cloudy nighttime (with a bright moon) where ghostly figures can be seen passing behind the fighters, traversing the path and dispersing upon passing the gateway. A man standing beside the oni statue can be seem saluting them as they pass by. Slash has a foggy-afternoon variation of the same setting. Aside from a lantern added to the pathway, the stage features no other distinctions from the X version.
Guilty Gear Isuka features a different setting. Albeit still high up, the flooring this time is entirely made of wood, with many wooden contraptions and knickknacks, such as a water mill and a crane, standing in the background. The setting seems to be located in a dense canopy of trees, one of them in the background being carved into a figure of a man, and two larger ones in the foreground, seemingly still in production, sustained by wooden beams. Two large torches and Japanese lanterns around the trunks, square and yellow in the right and round and red in the left, light up the place in the night. People stand on both sides in front of the carvings, dressed in kimono-esque costumes, red on the right and blue on the left. The stage actually appears to indicate some sort of festivity, perhaps a wood-carving contest between the red and blue sides, seeing the far different buildup in each.
Guilty Gear XX Accent Core returns with yet another unique visual. The stage is set in a bridge, again high up in the air, composed of many adorned blocks held by ropes and metal plates. A large wooden pillar, perhaps a gateway, stands in the right side of the screen, with many Japanese praying papers scattered on it. In the background, another bridge flows, filled with more pillar-esque gateways, holding a wire of lanterns, and leading into a small, shrine-like structure on the far left side. behind it all, a large sakura tree stands tall, with large ropes tied to it and going around the bridges. Even farther, a small roofed area on the right end of the bridge, and farthest behind a huge oni-themed pagoda stands atop the trees. The night sky is cloudy, with a huge moon visible lighting the stage.