The 2003 arcade shooter Ketsui will be landing on 360’s in Japan this April.
Cave is the developer of Ketsui and they have recently been looking to expand to western markets. As of right now the only title we know that is coming from them to the west is Deathsmiles. If that performs well, there is a chance we will see Ketsui in the future.
Unfortunately because of the localization plans, the title will be region locked if Cave continues their plans. Importing the title without a Japanese Xbox 360 may not be an option if Cave never decides to bring it over.
Thanks Grims Child!