The Incredibles Xbox 360 backwards compatible in Japan only?

Sure we got 21 more titles added to our backwards compatibility list (props for Dreamfall: The Longest Journey!). While the Japanese update included some bonus titles like Bistro Cupid and apparently the Incredibles (aka Mr. Incredible in Japan). The news straight from Microsoft never mentioned the Incredibles being added to the Japanese list, but it’s clearly on Japan’s list. Interestingly, the Incredibles is not backwards compatible for the US Xboxes. I wonder if the USA update added the Incredibles in as a playable game, but it wasn’t listed.