Are you sure? Have you been there, seen it?I dont know how to break it to you gently but Japans real, admittadly its lacking in the oft depicted 200M tall dinosaur type thing traipsing through the villages - but the lands themselves are confirmed as existing
Maybe I was less than precise wiv mi wurds.
The map was drawn before the first recorded visit to Japan by Europeans. I hesitate to call it a "discovery" as it was probably fairly evident to the Japanese. So it's existence was a sort of faint rumour or vague recollection at the time.