China has been increasing its surveillance of Japanese nationals following Tokyo's decision to release treated radioactive water from the crippled Fukushima No. 1 nuclear power plant, sources close to the matter said Sunday.

Cambodian authorities have reportedly detained a group of 20 or more people, including apparently Japanese nationals, in Phnom Penh. The group may have been involved in online scams.

Japan's Chief Cabinet Secretary Matsuno Hirokazu said the government is closely monitoring the possible supply of weapons by North Korea to Russia.

The yield on Japan's 10-year government bond has risen to its highest level since January 2014.

Japanese Prime Minister Kishida Fumio is planning to reshuffle his Cabinet and the main ruling party's executives as early as Wednesday.

The Japanese government's top spokesperson says North Korea is apparently trying to boost its ability to conduct surprise attacks.

Japanese Prime Minister Kishida Fumio has provided an explanation to his Malaysian counterpart about the safety of the treated and diluted water being discharged from the Fukushima Daiichi nuclear power plant.

Japan has successfully launched an H2A rocket carrying a probe that will attempt to make the nation's first lunar landing.

Japan's Prime Minister Kishida Fumio has announced an initiative to promote cooperation with Southeast Asian countries, which includes capacity building projects for 5,000 people over the next three years.

Tuesday marked one year since the death of a 3-year-old girl in central Japan from acute heatstroke after she was left inside a school bus.

Japan's Supreme Court has ruled against Okinawa Prefecture over a landfill project to relocate a US military facility. Okinawa opposes the construction of the new airfield within the prefecture.

Japan has decided to host a special summit with the Association of Southeast Asian Nations in December.