Possible Clues:

• Japanese convertible couch-bed
• A Japanese bed convertible to couch
• Japanese quilt used as a bed
• Mattress used as a bed
• Roll-up mattress
• Japanese mattress with wooden frame used as bed
• A Japanese bed-couch
• Kind of Japanese bed convertible to couch
• Source of pleasure going across to mattress
• A Japanese folding bed-chair