The Japanese official site has updated with great news: a hundred fans will get the chance to be on the Japanese Premiere, which probably will have a few actors of the film present, like the FOTR premiere. To join the campaign, you must have the “Passport to Middle-earth,” that comes in the FOTR DVDs. The site says that on the day of the DVD release (October 2nd) they are going to update with instructions to join the campaign.
Thanks to Elenah for the news!