To ring in the post-MGS4 era in a suitably festive tone, Konami had planned to hold a few big launch "events" in Tokyo tomorrow, some of those meet-and-greet, get-your-sleeve-signed deals. Now, though, due to "various reasons", it's cancelled them. With no explanation given, only a notice on the game's official website that it'll instead take place sometime later in the month. It could be down to Kojima and co. being a little pooped after the worldwide promo tour for the game, but there's always the chance Konami are a little spooked following the tragic events that took place in Akihabara earlier this week.
UPDATE - Seems it's most likely the latter. A Konami spokesperson has told Mainichi that "Because of the number of people expected to gather at these locations, we are taking safety into account".
For those that don't know, recently there was a massacre that occurred in Akihabara where 7 were killed and 10 were injured. The murderer ran over some people with a truck and then attacked people on foot with a dagger. Because of this, Konomi decided to cancel the launch event for safety reasons.
On a side note, someone I knew was lucky enough to have left Akihabara just moments before the incident occurred