Amazing, this is an Aluminum Cottage which has built at Minamikoma-gun, Yamanashi in Japan. I think its a semi-permanent house because if we looked at the structure, this house can be relocated. Based on the information, this Aluminium Cottage has 57.42m2 size on its 74.44m2 floor area and has been built last 2004. Pay close attention to this Aluminium Cottage design.

[Source]