Their patents are not for technological innovative things at all but are for things like "presenting a confirmation pop-up window after resuming a game from sleep” or for in a isometric game projecting a shadow for a character that's behind something so that the player know it's there.

They're the kind of obvious solutions that any expert in that domain would develop independently if asked to solve that problem, and patent applications for shit like that would be laughed out of the Patent Office anywhere else than Japan (and in the US before their Patent System went to shit in the late 90s).

I very much doubt this shit is valid in Europe unless there's some kind of Treaty that means Japanese patents also apply here. If taken to court in the US such patents would most likely be invalidated - the problem in the US is that the Patent Office will accept any old bollocks obvious to doman experts and containing zero innovation, not that Patent Law actually protects this shit and they will be upheld if somebody has the money needed to dispute them in to Court.

However this is Japan and the Japanese Patent System, so it's probably rotten to the core.