It seems that the man himself was real, according to reports at the time. He was arrested, but we can find no evidence that he vanished let alone that he came from a parallel universe.
What s True
A man was arrested in Japan in 1959 for using a false passport he created, one supposedly issued by a nonexistent country. What s False
The man did not hail from another dimension, he was prosecuted and sentenced by Japanese authorities, and he did not mysteriously vanish from a guarded hotel room.
Origin
Common classes of paranormal tales are accounts of persons who have mysteriously appeared (e.g., from the past, the future, other worlds, other dimensions) and those who have mysteriously vanished (to no one knows where). One example of this genre that has proved popular over the last few decades involves both of these elements: