The Real World, Part 1 is a season 3 episode of the 2003-2009 animated Teenage Mutant Ninja Turtles series. It originally aired over on the Foxbox on March 26, 2005. It's followed up by "The Real World, Part 2".
Leonardo arrives to Japan on an alternate Earth, where he encounters Tomoe Ame, who is protecting Lord Noriyuki from the Mogura ninja. When Tomoe is taken by the Mogura, Leonardo joins with Miyamoto Usagi and Gennosuke to rescue Tomoe from the clutches of Lord Hebi. But Chizu and the Komori ninja have other plans, as they try to stop Usagi and his friends.