Japan will be part of the jolly; Shikoku being the main area of interest to start with. A couple of nights in Tokyo and then the shinkansen down to Okayama followed by JR trains to Takamatsu and beyond. Swanning around the island for a week and then the reverse trip back to Tokyo and then, up-and-away on to Europe.
Europe probably means stopping in Paris for a few days and then taking a week or two to rail around Normandy, Picardy and Nord pas de Calais, taking a squiz at some of the many historic sites and galleries; cafes and patisseries are without number, so that we will have to exercise great constraint is we are to travel at all. The list of places, so far, includes: Caen and Bayeux, Rouen, Amiens, Laon or Lille; with day trips from Paris to the obvious Big V. Note: we will not be visiting any War Graves.
The Eurostar from Paris or Lille to London seems to be a good idea until you consider that the Olympics are in London this year. We may try to fly to a northern airport even if it means going to Amsterdam, Brussels, Paris to fly to the UK and avoid London.
Sheffield seems to beckon again for all the good reasons of last and other years. That depends upon the availability of an apartment; that we will find out about a month before we leave ...
When to leave ... May?
Coming back? The reverse flights are the favoured option, but the there may be a desire to visit Korea on the way ...