Chief Cabinet Secretary Suga Yoshihide says Japan is monitoring the situation in Kaesong.
He said his government is working closely with the United States and South Korea to gather and analyze information on the incident.
Share prices on the Tokyo Stock Exchange roared back on Tuesday after three trading days of declines.
The benchmark Nikkei Average ended the day up 1,051 points from Monday's close at 22,582, marking the year's third-largest daily gain.
A court in western Japan has handed a suspended prison sentence to a secretary of Upper House lawmaker Kawai Anri for paying campaign staff more than the legal limit during Kawai's run for the Diet last year.
Kawai, a member of Japan's main governing Liberal Democratic Party, was elected to the Upper House in July 2019.
Japan is joining international efforts to help Pakistan control locust swarms that are damaging crops.
Japan's government says it plans to work with other parties, including Japanese aid groups, to provide insecticides to Pakistan.
Shipments of ice have begun in Yamanashi Prefecture, west of Tokyo, two months later than usual due to the coronavirus outbreak.
Blocks of natural ice are used in the food industry to make shaved ice treats and for other purposes. Yatsuyoshi, a company in the city of Hokuto, usually starts shipping to restaurants and hotels in April ahead of the peak summer season.
The Japanese government will work closely with the United States and South Korea to analyze North Korea's reasons for demolishing an inter-Korean liaison office.
North Korea blew up the liaison office in the North's border city of Kaesong on Tuesday. The country had slammed Seoul for allowing North Korean defectors to send anti-Pyongyang leaflets across the border.
Testing by Japan's health ministry suggests that 0.1 percent of people in Tokyo have developed coronavirus antibodies.
The ministry tested 7,950 people aged 20 or older from June 1 to 7 and analyzed their blood samples for the presence of certain proteins that indicate a past infection.
NHK has learned that two Japanese lawmakers have decided to leave the main ruling Liberal Democratic Party over alleged violations of the election law.
Kawai Katsuyuki, former Justice Minister and his wife Kawai Anri, Upper House member have told sources that they don't want to cause any more trouble for the party.
Japan's health ministry says tests suggest that 0.1 percent of people in Tokyo have coronavirus antibodies.
The ministry has tested about 8,000 people in Tokyo, Osaka and Miyagi prefectures.
The Japanese Defense Minister has cited technical issues in announcing a halt to the planned deployment of the land-based Aegis Ashore missile defense system in the country.
Kono Taro said on Monday that his ministry discovered it has to revamp an interceptor missile in order to ensure the safe landing of a rocket booster.
Japanese Defense Minister Kono Taro says the government will suspend a plan to deploy the land-based Aegis Ashore missile defense system in the country.
Kono told reporters on Monday that due to technical and financial challenges the plan to deploy the system was being halted.
Officials in Tokyo are working on preventive measures to prepare for another possible surge of coronavirus infections. They've set up a team of experts amid a recent daily spike in confirmed cases.
Monday saw 48 new cases in the capital including 20 linked to a downtown nightclub district. It's the 2nd day in a row with more than 40 positive results.
Japan and Vietnam are in the final stage of negotiations to ease coronavirus entry restrictions and resume visits of each other's citizens on a limited basis.
Japan will first allow visits by businesspeople and technical trainees. It is targeting a resumption of travel as early as late June.
Aegis Ashore is a land-based missile defense system. Like ships equipped with Aegis, it is capable of intercepting ballistic missiles.
It was developed by the United States, and uses an advanced radar system and SM3 interceptor missiles.