Akihisa Hirata: Tree-ness House, a house and art gallery in Tokyo Architects: Akihisa Hirata Principal architect: Akihisa Hirata Project architect: Yuko Tonogi Design team: Kohei Oba, Masatoshi Sugiyama Client: Taka Ishii Location: Tokyo, Japan Site area: 139.55 sqm Building area: 99.68 sqm Gross Floor Area: 331.38 sqm Building scope 5F Height: 17.70 m (maxim) Design period: 2014. 6-2015. 9 Construction period: 2015-2017 Completion: January 2017 Structural engineer: Masato Araya (OAK), Ta