TOKYO. Dec 11: Empress Michiko has spoken her first words since she suffered an unexplained collapse two months ago whispering Your Majesty' and her daughter's nickname. 'Saya,' news reports said Saturday, according to AP.

The empress has reportedly been unable to speak since collapsing October 20. her 59th birthday.

The Imperial Household Agency announced shortly after midnight Friday that the empress said the two words on Tuesday. Kyodo News Service reported.

Palace doctors have said the empress was unable to speak because of psychological factors and has no physical or neurological problems.

She collapsed in the Imperial palace a few hours before a banquet to celebrate her birthday.