Emperor Akihito on Wednesday urged younger generations to "keep alive the memories of the Second World War" and the hardship that followed, as a way of avoiding conflict amid growing maritime tension in the East and South China seas.

The Emperor, 82, who met Philippine President Benigno Aquino privately at the start of a four-day state visit, expressed remorse over atrocities in the region by the Imperial Japanese Army 70 years ago.

The Emperor wanted to remind young people who had not experienced the war not to forget the hardship it brought to both Japan and other Asian countries, his press secretary, Hatsuhisa Takashima, told reporters in the Philippine capital.