A Russian strategic bomber, a TU-95, penetrated during three minutes in the Japan`s airspace, to the south of Tokyo.
This violation of the Japanese airspace made that at least 22 airplanes were mobilized, among them several F-15J. 
Japanese`s Ministry of Foreign Affairs has made a protest before the Russian embassy by the incident, whereas of the Russian side they denied the facts.
According to the Japanese`s Ministry of Foreign Affairs, the bomber flew over the island of Sofugan, located in the Pacific, to 630 km to the south of the capital.
This incident means the first violation of a Russian airplane in the Japan`s airspace since January of 2006.