The hiker's GPS watch, which uses satellite signals to log routes and monitors heart rate, was retrieved after the fatal attack, the Asahi Shimbun reported.

Japan’s government says that the chances of a magnitude 8 earthquake have increased. Scientists can’t predict when one will strike, but it represents a meaningful jump over typical odds.

This follows joint drills by Chinese and Russian strategic bombers and fighters on Tuesday that prompted Japan and South Korea to scramble planes to monitor them.

Two Russian strategic bombers Tu-95 that flew down from the airspace east of the Korean Peninsula joined a pair of Chinese H-6 bombers over the East China Sea for a joint flight down to the Pacific off the southern coast of Japan's Shikoku island.

Kareem El, a civilian from Washington, D.C., visiting Okinawa, was held by U.S. military police for declining to provide identification.

Japan, China and South Korea have held a health ministerial meeting and agreed to continue strengthening cooperation in the healthcare field.

Japan is assessing damage and cautioning people of potential aftershocks after a late-night 7.5 magnitude earthquake caused injuries, light damage and a tsunami in Pacific coastal communities

According to a recent Bloomberg survey of 50 analysts, all forecast that the central bank will raise its policy rate at the meeting.