TOYAKO  - The United States and Japan called Sunday for urgent action on red-hot oil and food prices that could derail the global economy on the eve of a summit of the world's richest nations. In pre-summit talks, Japanese Prime Minister Yasuo Fukuda said he and Bush had agreed that urgent efforts are needed to tackle surging oil and food prices. The dual crises "are having a negative impact on the world economy," Fukuda told a joint Press conference. "We agreed there's a need for swift efforts on these fronts." US President George W Bush said he remained concerned about North Korea's alleged enrichment of uranium and other security issues. But, speaking after talks with Fukuda ahead of Monday's (today) G8 Summit in Japan, he acknowledged North Korea had addressed some concerns. Fukuda said he would attend the Beijing Olympics opening, which other leaders will miss over rights concerns. "North Korea did provide a declaration of its plutonium-related activities and did blow up the cooling tower of its nuclear reactor at Yongbyon," Bush said at the summit venue in Tokayo on Sunday. "That's been verified and is a positive step, but there are more steps to be taken. We are concerned about enriched uranium and proliferation, human rights abuses and ballistic missile programmes." Asked by reporters about the ailing US economy, the American leader said he was committed to a strong dollar. "Our economy is not growing as robustly as we'd like..." he said. Speaking at the joint news conference with Bush, Fukuda officially announced he would attend the opening of the Olympic Games in Beijing in August. Looking at the nuclear disputes with Iran and North Korea, Bush told reporters: "Diplomacy has got to be the first choice of solving any of these problems. But military options remain on the table." White House spokeswoman Dana Perino told reporters that the United States would "consult with our allies about what Iran's response means," before commenting on Tehran's answer to a plan from six world powers offering Iran technology and negotiations if it suspends uranium enrichment.