Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Mitsubishi F-1 is Japan's first domestically developed jet fighter, and was the first fighter to enter production in Japan since the end of World War II. Mitsubishi Heavy Industries and Fuji Heavy Industries jointly developed the F-1. At first glance, it resembles the French/Anglo SEPECAT Jaguar, but was a completely independent Japanese effort.