Tokyo - AM3, a Japanese firm that has developed non-game content for Nintendo platforms, on Thursday announced DSvision, a new service that will offer downloadable comics, books, magazines, anime, movies and TV shows to Nintendo's DS handheld, IGN.com reported. Set to launch in March -- only in Japan, for the time being -- the Nintendo-approved service will first port content to microSD flash cards, which are then loaded onto the DS via a special adapter cartridge. AM3 said it expects to launch with 300 titles, and hopes to expand its library to 10,000 by 2010.