The Secretary General of the United Nations is making a landmark visit to Burma.
Mr Ban is due to meet with opposition leader Aung San Suu Kyi and pressed the government for more democratic reforms.
The Secretary General was denied a meeting with Ms Kyi during his last visit in 2009.
Before arriving in Burma, Mr Ban said the country was "re-opening to the world".
"The fresh start is still fragile," he said in New York before leaving for Burma.
Recent democratic reforms by the Burmese government have seen increased diplomatic engagement by the international community.
The EU confirmed on Staurday it is to open an embassy-level office in the country.
EU foreign policy chief Catherine Ashton - who is also currently in the country - said the EU's new office in Rangoon would offer investment and expertise, and oversee the management of aid programmes, particularly in remote rural areas.
EU diplomats have said the office will also play a political role in Burma.
