"If an international decision is reached, Japan will observe it," he said.
A Japanese journalist, Kenji Nagai, 50, was shot dead by security forces during anti-government demonstrations in Yangon on Thursday. Japan's Deputy Foreign Minister Mitoji Yabunaka flew into Myanmar on Sunday to express Japan's anger over the killing and to demand a full investigation.
He was also expected to pass on concerns from the international community regarding the junta's heavy-handed crackdown on protestors.
United Nations special envoy Ibrahim Gambari arrived in Myanmar on Saturday, meeting with opposition leader, Aung San Suu Kyi, who has been under house arrest since May 2003.
He is also reported to have met with junta leaders in their remote jungle bunker-city, Naypyitaw, although it is not clear if he has yet met the country's leader, General Than Shwe, local media said.
On Friday the U.S. imposed financial sanctions against 14 top leaders of Myanmar's military junta, freezing assets in U.S. banks or other financial institutions coming under the country's legal jurisdiction. The order also prohibits any U.S. citizens from doing business with the junta leaders.
President Bush also called on the international community "to help the Burmese people reclaim their freedom," in a speech to the 62nd General Assembly on Wednesday.
The UN Security Council failed to adopt a draft resolution on Myanmar on Thursday, after China and Russia blocked international calls for sanctions against the country.
China's UN Ambassador Wang Guangya said, "We believe sanctions are not helpful for the situation down there," while Vitaly Churkin, Russia's UN envoy said that the country needed first a "return to security."
Recent protests in Myanmar, which were the largest in more than two decades, began last month when the junta drastically raised the price of fuel, leaving many people unable to afford even a journey to work.
However, the streets have been noticeably calmer in recent days, and opposition figures are expressing doubt that the ruling junta can be toppled without international assistance or intervention.
The last anti-junta demonstrations in Myanmar were led by students in 1988. Security forces opened fire on crowds, and around 3,000 people were reported killed.
