Heightened tensions in the East Asia region increased after Japan scrambled F-15J Eagle fighters in response to Russian military activity.
According to a report by the Daily Mail, the first incident involved a pair of Tu-95 "Bear" strategic bombers. Japan then scrambled the Eagles, which are locally-built versions of the F-15C Eagle in service with the United States Air Force.
The Russians later sent two pairs of maritime patrol planes. One consisted of Tu-142 "Bears," the other were Ilyushin Il-38 "May" aircraft.
A Russian Tu-95 Bear 'H' photographed from a RAF Typhoon Quick Reaction Alert aircraft (QRA) with 6 Squadron from RAF Leuchars in Scotland. (Photo by Ministry of Defense)
The actions come as the United States and Japan are planning what Reuters called a "joint show of force" in the East China Sea. The United States has sent the Nimitz-class carrier U.S. Carl Vinson (CVN 70) to the area as the tensions have risen, and Japan reportedly plans to deploy destroyers alongside the American carrier.
In March 2017, the United States and Japan conducted joint drills, and Japan sent their newest carrier, the Izumo to the South China Sea.
The Tu-95 "Bear" is Russia's primary strategic bomber. According to the Naval Institute Guide to World Military Aviation, it has a range of 8,100 nautical miles without aerial refueling.
Depending on the version, it can carry up to 16 AS-15 "Kent" cruise missiles that have nuclear or conventional warheads. The plane can also carry anti-ship missiles or regular bombs.
A Soviet Ilyushin Il-38 (NATO reporting name "May") in flight in 1986. (DOD photo)
The Il-38 is a maritime patrol aircraft that is smaller than the Tu-142. According to the Naval Institute Guide to World Military Aviation, the Il-38 has a range of 3,890 nautical miles, a top speed of 390 knots, and can carry up to 11,000 pounds of ordnance.
The Il-38 was involved in a February 2017 incident in which the Arleigh Burke-class guided missile destroyer USS Porter (DDG 78) was buzzed.