Tokyo  - US President Barack Obama Saturday declared Washington's intent to renew its active role in the Asian region after being "disengaged" in recent years.

"As an Asia Pacific nation, the United States expects to be involved in the discussions that shape the future of this region, and to participate fully in appropriate organizations as they are established and evolve," he said.

Obama was speaking to Japanese citizens, scientists and business people at Suntory Hall in Tokyo, a day after meeting with Japanese Prime Minister Yukio Hatoyama.

Obama acknowledged that the US "has been disengaged" in recent years from regional organizations that promote security and prosperity in Asia, a clear reference to his predecessor George W Bush's rejection of international organizations.

"So let me be clear: those days have passed." (dpa)