Japan announced Friday that it will impose unilateral sanctions on eight foreign firms and individuals as punishment for their alleged dealings with North Korea. The sanctions are among the latest international efforts to isolate the country and follow sanctions imposed by the United Nations Security Council earlier this month. North Korea drew a swift rebuke from the international community after successfully testing two intercontinental missiles in July, which experts say may eventually be able to deliver a nuclear warhead to the US mainland. Japan's Chief Cabinet Secretary Yoshihide Suga said Friday, "it is extremely important to keep pressuring North Korea in coordination with US, South Korea and other countries."