Major Nelson has made a not-so-subtle "psst!" post on his blog announcing – to a Western audience – that a demo version of From Software's Ninja Gaiden clone homage, Ninja Blade, has hit the Japanese Xbox Live Marketplace. In other words, if you have a Japanese Xbox Live account set up, make with the downloading.
Comments on the Major's post indicate that the demo is both region-free and in English ... much like the Resident Evil 5 demo that recently went up on the Japanese XBLM, only to be region-locked after Capcom realized that – shockingly – people outside of Japan really wanted to try the game.