I've decided to organize a Bar Camp in Tokyo for late May. (See the entry Wikipedia for background on Bar Camp).
Please sign up here if you want to attend: Tokyo BarCamp
You can follow Tokyo Barcamp on Twatter: www.twitter.com/tokyobarcamp
Bar Camp differs from other tech conferences in that everyone must participate. There are no presentations/workshops/discussions scheduled in advance, instead attendees sign up to do events on the day, usually by writing their events on huge pieces of paper on the walls. Also, Bar Camp is free.
At Tokyo Bar Camp expect presentations/workshops/discussions on blogging, podcasting, Perl, AJAX, the theory of hypertext, web spidering, smart mobs, wiki, Ruby-On-Rails, wearable computers, augmented reality, startups, Web 2.0, Web 3.0, Web 4.0, the maker revolution and maybe even teledildonics.