Japan Art Media, or JAM, is a Japanese video game development studio founded in 1989. The studio began developing games for the Game Boy, but soon branched out to develop games on many other platforms, mainly Super Nintendo and PlayStation. Japan Art Media also had a strong partnership with Yanoman, which published most of their games until the mid 90s.
JAM is primarily known for their series Aretha, which was very popular in Japan and spanned 3 Game Boy and 3 Super Nintendo games. However, after the release of Rejoice: Aretha Oukoku no Kanata, the company never made another game in this series, instead developing games for popular franchises, most notably the Gundam and Lunar games. To this day however there is still a large following of Aretha fans in Japan, with lots of fan-sites, fan-art and fan-fiction still being done.
JAM has experience in creating traditional RPGs (Aretha, Songmaster, Lunar), action RPGs (Trinea, Haou Taikei Ryu Knight, Rejoice), and strategy war games (SD Gundam GNEXT, Yuugen Kaisha Chikyuu Boueitai: Earth Defenders Corporation). Recently, they have participated in the development of Super Smash Bros. Brawl.