Indlu I-Three Roof yindlu eseOkinawa, eJapane. Izindlu zendabuko zase-Okinawa zisebenzisa amaphethelo ophahla amade ukunciphisa ukushisa kwendawo esondelene nezindawo ezishisayo, kodwa amaphethelo ophahla ajulile futhi avimba ukukhanya kwemini futhi enze ingaphakathi libe mnyama. Uphahla luhlukaniswe izingxenye ezintathu, ukuze ukukhanya kwemini kungene ngasohlangothini olusenyakatho futhi umoya udabule endlini kalula. Uphahla oluhlukanisiwe lunikeza indawo ngayinye ubude besilingi obufanele futhi ludale ukwehluka esikhaleni. Isikhala esingenazinsika esingamamitha angu-4.0 sinikezwa ngaphansi kwamaphethelo ophahla aphansi futhi singasetshenziswa ngokuvumelana nezimo. Isakhiwo sakhiwe ngokhonkolo oqinisiwe onezindonga zikakhonkolo ezivezwe obala.