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Gasuden Koken
Japanese experimental long-range aircraft / From Wikipedia, the free encyclopedia
The Gasuden Koken (also known as the Kōken-ki (航研機)) was a Japanese long-range research aircraft of the 1930s. It was built by the Tokyo Gas and Electric Industry (also known as Gasuden), to break the world record for longest flight, setting a closed circuit world record of 11,651.011 km (7,240 mi) in March 1938.