Japanese Defense Minister Takeshi Iwaya has said that Japan is closely monitoring North Korea's military activities, but refrained from revealing details about the latest development.
Speaking in an Upper House committee on Thursday, Iwaya said the government will work closely with the US and other countries in collecting and analyzing necessary information and monitoring the situation.
Japan's government plans to continue working to end restrictions on imports of Japanese fishery products, even after last week's ruling by the World Trade Organization in South Korea's favor over its ban on seafood imports from Japan.
But Japan may need to devise ways in negotiating with foreign countries, as both lawmakers and fishermen are urging the government to do more.
Japan will call on China to strengthen measures to protect intellectual property rights as the two countries hold a high-level economic dialogue in Beijing on Sunday.
Six Japanese cabinet ministers will attend the talks, including Foreign Minister Taro Kono, Economy and Trade Minister Hiroshige Seko, and Transport Minister Keiichi Ishii.
Sources say the wife of former Nissan Motor chairman Carlos Ghosn has returned to Japan and is set to be questioned by judges in Tokyo on Thursday.
Ghosn was arrested for the fourth time last week on suspicion of aggravated breach of trust involving Nissan funds sent to the automaker's dealership in Oman.
Investigators believe Ghosn transferred some of the funds to a shell company.