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.

Source: MOFA