While we’re on the subject of release dates Ninja Gaiden 2 will be arriving in Japan on June 5, two days after the North American release. Considering how that’s a Thursday and typically games are released there on Thursdays it’s shouldn’t be thought of as a delay. Asia regions (i.e. Hong Kong, Korea and Singapore) get Ninja Gaiden 2 on June 3, the same day it arrives in North America. No word if this will be region free yet, but it’s something to keep an eye on if you want to save a couple of bucks.
Unfortunately, European regions have Ninja Gaiden 2 with a TBD release date. Back at GDC Microsoft seemed adamant about bringing the game worldwide in June 2008 so it’s likely Europe will be seeing the game around the same time too.