Japanese investigative sources say unidentified objects suspected to be drones have been spotted above several places in Tokyo, including an area near the Imperial Palace.
The sources say the objects were observed flying between about 8 p.m. and 10 p.m. on Thursday local time. They say the objects were moving while flashing red and white lights.
Tokyo police are investigating how two knives ended up beside the school desk of Prince Hisahito, the grandson of Emperor Akihito.
Investigators said the knives were found on Friday at Ochanomizu University Junior High School in Tokyo's Bunkyo Ward which the prince attends. They said there was no one in the classroom at the time as the students were in another part of the school.
Japan's Self-Defense Force says it has found what could be debris from a missing F35A fighter jet that's feared to have crashed into the sea.
Officials say the pilot was flying with three other planes of the same model on a training mission. They say there were no reports of problems before contact was lost.
A group of Japanese researchers say they have unearthed the oldest rocks ever found in the country. They say the 2.5-billion-year-old rocks are a window on the formation of Japan's islands.
The team, led by Yasutaka Hayasaka, an associate professor at the Graduate School of Science at Hiroshima University, announced its findings on Monday.
A special investigative panel of Japan's health and labor ministry has concluded that there was no systematic cover-up of the ministry's flawed statistics, although the office in charge made false explanations.
The ministry set up the panel of outside experts in January to examine problems linked to its monthly survey on wages and working hours.
A US research team has discovered a battleship that belonged to the now-defunct Imperial Japanese Navy lying in waters about 1,000 meters deep off the Solomon Islands. The ship sank in a battle in the South Pacific during World War Two.
NHK has obtained video footage of the ship, named the Hiei. The discovery has led to a new theory about why it sank.
Officials at a child welfare center near Tokyo say they do not know when a 10-year-old girl who was temporarily in their care returned to her parents' home where she was fatally abused.
Mia Kurihara was found dead at her home in Noda City, Chiba Prefecture, in late January. Her parents have been arrested on suspicion of inflicting injuries.
The prefecture's child welfare center has been criticized for its handling of the case.
Japan Coast Guard officials have found two men on a wooden boat drifting in the Sea of Japan off Aomori Prefecture in northeastern Japan. The men are believed to have come from North Korea.
A local fishing cooperative informed the Coast Guard of the boat's presence on Sunday morning. It was drifting about 1.5 kilometers off the town of Fukaura.
Police in Shimane Prefecture, western Japan, on Sunday transferred to immigration officials four men found in a wooden boat that drifted ashore. The men are expected to go through procedures to return to North Korea.
The boat was spotted on January 8th on the shore of the town of Okinoshima on an island in the Sea of Japan. Police took into protective custody the four crewmembers who appear to be in their teens through 30s.
Nissan Motor officials found safes in an apartment in Rio de Janeiro provided to its ousted chairman Carlos Ghosn. They suspect that the safes may contain assets that Ghosn allegedly purchased illegally.
Court filing shows that Nissan officials found 3 locked safes on November 30th as part of an in-house probe into the alleged financial misconduct by Ghosn. They are seeking permission from a court in Brazil to open them.