The Legend of the Mystical Ninja is an action-adventure game by Konami, and was released for the Super Nintendo Entertainment System in 1991.

The game was critically acclaimed. In 1992, Super Play stated: "Still one of the best games for the system (if you like this sort of thing), mixing RPG adventure-style wandering with side-on platform action. It's got some wonderful oriental music, beautifully drawn graphics and is a supremely addictive challenge." In 2010, the game was included as one of the titles in the book 1001 Video Games You Must Play Before You Die. GamesRadar ranked it as the 45th best SNES game for its "stellar ancient Japan-inspired soundtrack, beautiful graphics alive with color, and just enough challenge to make it a very addictive affair. It’s not breaking down any barriers for platforming or RPGs, but it’s definitely one of the top games on the SNES."

According to Electronic Gaming Monthly, the game "didn't catch on too much in the U.S." but was popular in Japan.