The Tokyo Metropolitan Government has started work to improve water quality at a venue of this year's Olympic and Paralympic Games after higher-than-acceptable levels of E. coli bacteria were detected there last year.
Odaiba Marine Park is the intended venue for the swimming leg of the triathlon for the Tokyo Games.
The Defense Ministry has launched an environmental survey on an island in southwestern Japan where it plans to relocate US military exercises.
About 20 people, including ministry officials, arrived at Mageshima island in Nishinoomote city, Kagoshima prefecture, on Tuesday morning. The ministry says they will first study the island's wildlife and vegetation.
Highways, airports and train stations around Japan are busy on Saturday as year-end travelers head for their hometowns and holiday destinations.
Japan Railways companies say that non-reserved cars on Shinkansen bullet trains from Tokyo were filled to capacity. The most crowded trains reached 180 percent capacity.
Construction has begun on one of six stations for ultra-high-speed maglev trains in Kanagawa Prefecture, near Tokyo.
Officials from the Central Japan Railway Company, which will operate the magnetically levitated trains, and representatives of local municipalities attended a groundbreaking ceremony on Friday.
The key ritual of the Daijosai, or Great Thanksgiving Ceremony, has just started at the Imperial Palace. Daijosai is celebrated only once after a new Emperor's accession to the throne.
Emperor Naruhito, in a white traditional ceremonial dress, emerged on a corridor of the Daijokyu complex, built specially for the occasion in the palace's East Gardens, a little before 6:30 p.m. on Thursday.
Japan's welfare ministry has launched a new investigation into Japanese nationals believed to have died in internment in Siberia after World War Two following the discovery of new records.
The ministry says around 53,000 Japanese are believed to have died due to hard labor in the bitter cold while they were interned by the former Soviet Union. Of them, about 15,000 are not confirmed in Russian documentation.
A Japanese telecom company has begun operating a vessel that enables people to use mobile phone services in typhoon-hit Chiba Prefecture, east of Tokyo.
Mobile phone services remain unavailable across the southern and other parts of the prefecture, partly due to massive power outages caused by Typhoon Faxai. The storm struck the greater Tokyo area a week ago.