Sekai Ninja Sen Jiraiya (世界忍者戦ジライヤ, lit. "World Ninja War Jiraiya") is a Japanese television series that aired on TV Asahi and its affiliates from January 24, 1988, to January 22, 1989, lasting 50 episodes. It was the seventh installment in Toei's Metal Hero Series franchise of live-action superhero shows and the last of the Showa era. The series centers around a young ninja master named Toha Yamaji, who must face numerous ninja masters from different parts of the world by donning a special armor to become his alter-ego Jiraiya.

The English title given by Toei's international sales department is Ninja Olympiad Jiraiya, a reference to the Seoul Olympics & the Calgary Olympics that was held at the time the series was airing. Jiraiya's suit would later be used in Power Rangers Super Ninja Steel, using footage from Shuriken Sentai Ninninger, where Jiraiya had an appearance.