Japan

Japan existed in multiple universes.

Tokyo was located in Japan in at least one universe. (COMIC: MechaGiantJunterling)

According to Sid, a particular location where thick stalks of bamboo, each one standing without uniformity” stood in “pools of stagnant water” existed simultaneously in Japan, China, and the Gardens of the Gardens of the Strange and Wonderful House “depending on your perspective”. (PROSE: Our Strange and Wonderful House: The Secrets of Our Gardens (Part 2: Accursed Springs))

In Reality Z-25 31-H, Takako Yoshida, later Battle Angel, was born in Yokohama, Japan. Her father was in debt to the Japanese criminal organisation known as the Yakuza, who eventually had him killed before taking his daughter and widow into slavery, training the former as an assassin from the age of twelve. (PROSE: Battle Angel Yoshida Bio)

In one universe, Imperial Japan persisted into the modern age as a warmongering power. By the time the local incarnation of Jenny Everywhere was on the cusp of discovering her powers, they were successfully holding Manchuria and had made advances into Outer Mongolia. (COMIC: The Genesis of Jenny Everywhere)

In one universe, after Jenny Cornelius unleashed an atomic sea monster to create a distraction, the governments of the world were dumbfounded except for Japan, who somehow already had a contingency plan for this exact situation. Captain Stewart found this very suspicious. (PROSE: The Folly of Men)