You can recognize the language that I speak, which says to me that there's a common theme there. That alone says that my world must have developed along similar lines. The names and borders of countries may be different, but there is a common thread there.
You said that this world is similar to a country in your world called Japan, right? Or at least the two regions we have access to are. It seems reasonable to me that there's probably a country similar to Japan in mine, if my country has a direct parallel in yours.
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You can recognize the language that I speak, which says to me that there's a common theme there. That alone says that my world must have developed along similar lines. The names and borders of countries may be different, but there is a common thread there.
You said that this world is similar to a country in your world called Japan, right? Or at least the two regions we have access to are. It seems reasonable to me that there's probably a country similar to Japan in mine, if my country has a direct parallel in yours.
I can't know this for certain but it's possible.