Now this seems to be heavy handed censorship by the Japanese government. This is from The MIT Technology Review Bog site:> Security and Defense
Japanese Government Bans Speech by Security Critic 
posted by Simson Garfinkel @ 11/13/2004 11:19:09 AM

JUKI net is Japan’s national ID system. Ejovi Nuwere performed a security audit of the system for Nagano Prefecture one year ago. Recently Ejovi was invited to speak at the PacSec security conference about JUKI net. Soumushou, the Japanese government agency that maintains JUKI net, prevented his talk by threatening the Japanese event sponsors who currently are seeking contracts from the government.