No longer satisfied with rewriting history to deny the Rape of Nanking, the enslavement of the "comfort women", and other attrocities (the Japanese version of holocaust-denial), the far-right, ultra-nationalist Japensese revisionist group ironically called "Association for Advancement of Unbiased View of History" (see their website here, and a wikipedia entry on their founder here) is now promoting anti-Semitic conspiracy theories. They claim that the fact that a Jewish attorney on General MacArthur's staff worked on the Japanese Constitution indicates the hidden hand of the Jewish conspiracy to dominate Japan!
Read their ravings here: The Hidden Hand: The Jewish Role in Post-War Japan by Aldric Hama
NOTE: The leader of the Japanese revisionist history movement, which has had great impact both within Japan and on Japanese relations with China and South Korea, is Nobukatsu Fujioka.
UPDATE (4/1/07): Here's a Washington Post piece on this (by Steve Clemons) that you might find interesting. And here's a recent blog piece on the subject by Mr. Clemons.