The Sony Entertainment Network, which is already live in the US and Brazil among other countries, will launch in Japan on May 29th. As you may recall, the service is a browser-based marketplace with games, movies and other media available for download. SEN is especially targeted at PlayStation users; games and videos purchased will automatically show up in the PlayStation store. Given that Sony calls the Land of the Rising Sun home, it's high time its Entertainment Network opened its doors to Japan. And with E3 less than a month away, the world may get a taste of Sony's next-gen hardware for enjoying this service -- stay tuned.