(images via kenchikukagu)This is by far the holy grail of space-saving goodness. The Kenchikukagu is a set of mobile furniture that includes a fully functioning kitchen. Take a peep at the video clip below and behold the pieces in action. The set also includes a mobile guest room and work space with lighting. These are not concept designs, and are available at Amazon Japan for JPY 800,000 (about $7,346).