Japanese weather officials forecast rain and thunder storms will hit wider parts of western Japan from Thursday night through Saturday.
The Meteorological Agency expects a seasonal rain front and a low-pressure system to approach the region on Friday and later.
Japan's government plans to reduce coal-fired power generation by about 90 percent by fiscal 2030.
Coal-fired power plants are under review worldwide for their huge emissions of carbon dioxide. Countries are being urged to achieve a carbon-free society under the 2015 Paris Agreement on climate change.
The Japanese government is moving to ease entry restrictions for Taiwan and some countries in Southeast Asia where coronavirus infections are largely contained.
The government is considering starting talks with Taiwan and countries including Singapore and Brunei as early as July, aiming to allow businesspeople to travel between Japan and them.
Japan is keeping an eye on Hong Kong to see how the implementation of China's national security law for the territory will affect its democracy and Japanese business activity there.
China's top legislative body enacted the national security law on Tuesday to crack down on anti-government protests.
There are now more than 10.3 million coronavirus cases worldwide. And as the number continues to surge, scientists around the world are rushing to develop a vaccine. Researchers in Japan launched the country's first clinical trial on Tuesday.
Pharmaceutical company AnGes says trials are now being conducted on 30 healthy people at a university hospital in Osaka.
Japanese municipalities and health officials confirmed 110 new cases of coronavirus infection across Japan on Monday, bringing the total to 18,631.
With the 712 cases from the Diamond Princess cruise ship that was quarantined at Yokohama port added, the total number of confirmed infections comes to 19,343.
The Japanese government will raise fines for smuggling pork and other meat products into the country on Wednesday as part of its efforts to prevent an outbreak of African swine fever, or ASF.
Fines for individuals will be tripled to as much as 3 million yen, or about 28,000 dollars. Penalties for corporations will be raised to 50 million yen, or about 470,000 dollars -- 50 times higher than the current level.
Japanese weather officials are warning of possible landslides and flooding in low-lying areas as torrential rain is expected to continue in Tokai and the Izu Islands late into Sunday night.
They say warm, damp air is flowing toward the seasonal rain front, making atmospheric conditions unstable, mainly in the Kanto-Koshin and Tokai areas. Heavy downpours of more than 30 millimeters an hour with thunder are likely in these areas.
Japanese weather officials are warning of possible landslides and flooding in wide areas from Kyushu to the Kanto region as torrential rain is forecast through Sunday morning.
In one hour through 5 a.m., 40 millimeters of rain fell on Makurazaki City in Kagoshima Prefecture, Kyushu.
New cases of coronavirus are once again rising in Japan including among young adults. The nation's daily tally surpassed 100 on Friday for the first time since early May.
More than half the cases came from Tokyo. It confirmed 54 infections, marking the second time the number has topped 50 this week.
The Japanese government has lodged a protest with Russia over a geological survey in waters near the islands controlled by Russia and claimed by Japan.
Japan's foreign ministry says Russia had notified the Japanese side of a plan to carry out the survey from June 18 to September 18 in wide areas of the Sea of Okhotsk.
Weather officials in Japan are warning of possible mudslides as heavy rain is expected across much of the country on Friday.
A rain front and a low-pressure system are bringing localized downpours to the Kyushu and Chugoku regions in western Japan.
A plane full of Japanese business travelers has landed in Vietnam for the first time since the coronavirus pandemic prompted each country to issue travel bans.
The countries agreed to ease restrictions since local infections appear to be under control.
A flight from Japan to Vietnam has taken off for the first time since the two countries agreed to ease travel restrictions which were imposed due to the coronavirus pandemic.
A plane carrying 150 passengers, mainly businesspeople, left Narita Airport near Tokyo on Thursday. The airline provided them with protective gowns and face masks.