The Mysterious Murasame Castle (JP) is a video game developed and published by Nintendo for the Famicom Disk System on April 14, 1986. The Mysterious Murasame Castle was one of the earliest games for the FDS, and was one of the first original titles along with The Legend of Zelda. However, unlike the latter, The Mysterious Murasame Castle never saw release outside of Japan until it released on the 3DS Virtual Console in 2014.