President Asif Ali Zardari on Wednesday called on the Emperor of Japan, Akihito at his palace and discussed bilateral relations and Pakistans fight against terrorism and militancy.The Emperor recalled his visit to Pakistan in early 60s as Crown Prince and said that he fondly remembered that visit. The President felicitated the Emperors son and Crown Prince Naruhito on his birthday (today) and invited him to visit Pakistan.Earlier, the Emperor came out of his palace and warmly received the President. This was President Zardaris second meeting with the Emperor Akihito. In April, 2009, President Asif Ali Zardari met him when he visited Japan leading Pakistan delegation at the Friends of Democratic Pakistan meeting.