Complex sentence: Much later he toured with them in France and Japan where he had also toured with the London Philharmonic Orchestra and since 1980, James Loughran has been Permanent Guest Conductor of the Japan Philharmonic Orchestra who in 2006 made him Honorary Conductor.
Split into simpler sentences: Much later he toured with them in France and Japan where he had also toured with the London Philharmonic Orchestra. Since 1980, James Loughran has been Permanent Guest Conductor of the Japan Philharmonic Orchestra who in 2006 made him Honorary Conductor.