Japan effectively denies entry for Antonio Negri

Antonio Negri ('Empire', 'Multitude' etc) was to arrive in Japan this week for a series of lectures and discussions. I was to hear him speak at the International House of Japan this coming Saturday. I received a phone call from I-House about one hour ago informing me that his trip has been abruptly cancelled. The organising committee is holding a meeting to explain the circumstances of this decision tommorrow evening, which I intend to attend.
For immediate news please see THIS webpage on the I-House website, which has the letters from Negri explaining the course of events in Japanese and French.
More details as I get them.