Possible Clues:

• Straw mat covering goodbye note
• Rubbish provided by foreign friend? Cast it on to the floor
• Mat in a teahouse
• Mat traditionally twice as long as wide
• Tearoom mat
• Farewell note placed on floor inTokyo?
• Rubbish dropped on French friend’s floor-covering
• Judo mat
• Mat made of soft rush
• I'm leaving — then I'm back for Asian furnishing