Starting this week, Japanese developer 5pb, who did the port, has ceased shipment of the game. 5pb issued a statement on the DoDonPachi Dai Ou Jou Black EXTRA Xbox 360 webpage back in February. Users had been reporting "several bugs," which 5pb confirmed in-house.
"We apologize for the trouble this has caused customers," 5pb stated in an online message. "Currently, we are investigating measures to counter this."
In its most recent update, 5pbs stated it would be announcing details about an Xbox LIVE update for the game shortly. Currently, the game is filling up the bins at Japanese retailers.