missiles (to deliver them) have been the biggest threat to Japan," he said. "We should deal with these issues as a priority matter."

Suzuki, 68, said it is "reasonable" for Japan to impose sanctions on North Korea and consider tightening them in reaction to the launch of seven missiles including a long-range Taepodong-2 on July 5.

"But Kim Jong Il's administration has yet to starve (owing to economic assistance by China and South Korea). That explains why North Korea doesn't show up at the six-party talks," Suzuki said.

He was referring to the China-hosted talks with Japan, South and North Korea, Russia and the United States on North Korea's nuclear ambitions. The negotiations have been stalled since last November due mainly to bickering between Pyongyang and Washington.