This blog http://www.zetetique.ldh.org/herai_en.html explains the whole place very thoroughly and systematically debunks the evidence for the site being genuine eg the document they have there, written in Chinese lettering that didn't make it to Japan till around AD600 is signed Jesus Christ Christmas God.... hmmm.
It's an interesting article and gives some explanation for motivations to concoct the story. I wonder about the date 1935 though. It the time when fascist Japan was looking to distinguish itself from the rest of Asia, to justify pursuing aggressive imperial policy. I wonder if that comes into the background of it at all..
|A road sign - the tomb of Christ|
|A plaque from the Israeli embassy ...(a much better picture is on|
the afore mentioned blog)
|The alleged grave of Jesus|
|The grave of Jesus and a memorial for his brother|