A portion of a GamesIndustry interview with Masaya Matsuura, creator of Parappa...

GI: You got a little heat for saying that the bubble has burst for DS software in Japan. Did you want to clarify that?

MM: It is not a simple bubble. The DS successfully launched in many territories simultaneously, but maybe at the end of 2006 to 2007 many titles - sequels - lost [money]. Very few titles are getting much better.

This means, especially for the Brain Training titles or non-gaming content, it is getting difficult right now.

GI: Is there a similar situation going on with the Wii?

MM: Wii's case is much more difficult. It currently looks as if no third-party title is successful in Japan. So, this means to make a good Wii game requires longer time to make the interaction better.

GI: At the awards show last night, the only Nintendo titles to be recognised were Mario Galaxy and Zelda: Phantom Hourglass - both first-party games. Most of the games with the big accolades - BioShock, Mass Effect, The Orange Box - weren't Wii games either.

So, even though the Wii itself is selling tremendously well, perhaps the software as a whole isn't as impressive?

Full interview here