According to the Ministry of Foreign Affairs of Japan (MOFA), H.R.H. Prince Guillaume, The Hereditary Grand Duke of Luxembourg will visit Japan starting on May 14-18, 2011.
It was also noted that the prince will:
… visit, Their Majesties the Emperor and the Empress of Japan will invite H.R.H. Prince Guillaume to the Imperial Palace for a luncheon. His Imperial Highness the Crown Prince of Japan will have an audience with H.R.H. Prince Guillaume.
More information should be released… hopefully.