 On 19 December 1910, Tokugawa flew Japan's first successful powered aircraft flight at Yoyogi Parade Ground where Tokyo's Yoyogi Park is now located, only seven years after the Wright Brothers' first flight in the United States.On 5 April 1911, Tokugawa piloted the inaugural flight at Japan's first permanent airfield in Tokorozawa.Shortly afterwards, he successfully took the first aerial photographs in Japan to prove the utility of the aircraft for reconnaissance.