Japan Business Federation Chairman Fujio Mitarai expressed strong regret Wednesday about the launch North Korean missiles that came down in the Sea of Japan.

"It is likely part of (North Korea's) brinkmanship diplomacy, but a move that ignores warnings from the international community and threatens Japan's security cannot be tolerated," the head of the powerful business lobby, also known as Nippon Keidanren, said in a statement.

"It is difficult to predict how things will develop further, but we hope the government will gather accurate information and will cooperate with the United States and the international community," Mitarai added.

The Defense Agency said the six of the seven missiles were fired between 3:30 and 8:20 a.m. All came down in the Sea of Japan, off the coast of Russia's Far East.

There have been no confirmed reports that parts of the missiles came down in Japanese territory.