The following news summary and photographs were obtained from the Japanese language Mainichi Shimbun and Asahi Shimbu, and the English language the Japan Times, Asahi Evening News, The Daily Yomiuri and the Mainichi Daily News.
September 7-10, 1976
Entry of the MiG-25
On 6 Sep 1976, at 1:11 pm, four radar sites detected an unidentified aircraft about 300 kilometers northwest of Hakodate, approaching Japan from the direction of Vladivostok. Aircraft speed was 810-km per hour and altitude was 19,000 ft.
At 1:20 pm, two Phantom jets from the ASDF 2d Air Wing at Chitose AB scrambled to intercept the aircraft. In Russian on an international emergency wavelength, the ASDF warned the pilot of the intruding aircraft regarding possible violation of Japanese air space. The pilot did not respond.