Japan's top government spokesperson says North Korea may engage in further provocations, including the test-firings of various types of missiles or a nuclear test.
Chief Cabinet Secretary Matsuno Hirokazu spoke on Tuesday morning after South Korea's military said Pyongyang had fired two short-range ballistic missiles.
Matsuno said Japan will continue to gather and analyze intelligence data and engage in surveillance, while keeping in close touch with the US, South Korea and other countries.
He said the Japanese government will do its utmost to ensure the country's peace and security.