There are several claims that Jesus is buried somewhere in India, but I have never heard that he ever made it as far as Japan though. It seems very
unlikely. I don't believe that his bones is found in any grave, for he needs them to walk and talk. Jesus will return. Sooner or later everyone on
this planet will see that the promice he gave us some two thousand years ago is about to be fulfilled.
Here you can find images of the real tomb of Christ. The one which he was layed in that Wednesday evening back in year 30 AD:
(Contains a 360° VR look to the grave site and inside the tomb)
(Contains images and links to other sites about the Garden Tomb)