Exterior, Treehouse Building Type, Green Roof Material, Wood Siding Material, Flat RoofLine, and Tiny Home Building Type Japanese architect Takashi Kobayashi of the Tree House People has been declared a “tree house master” by Design Made in Japan. Seamlessly integrating nature and design, this tiny tree house is certainly not just for children.  Photo 4 of 10 in 10 Surreal Tree Houses That Will Make Your Childhood Dreams Come True