Just when mobile phone users may have thought the worldwide proliferation of video games and social networking services into the popular culture left little room for radical new tacks, the combination of the two has opened up new avenues.

But one such popular provider may find some of its avenues closed off under a new filtering regime.

Mobage-town, which offers the combined service, has become a giant in Japan's mobile phone Web world since its February 2006 launch, especially with young people.