Umutwe wo Kubamo Wedge House ni inzu ifite amagorofa atatu, yubatswe ku kibanza gito gifite umusozi uzamuka cyane mu Mujyi wa Ikeda, mu Buyapani. Igishushanyo cy'inyubako gifite imiterere y'ikimuga (wedge) gishyira igorofa rinini hejuru n'igorofa rito munsi y'ubutaka, kugira ngo hatabaho imbaraga nyongera zishyirwa ku rukuta rwa kera rwo kubika ubutaka (retaining wall). Amagorofa abiri yo hejuru yubatswe mu biti, naho munsi y'ubutaka hakoreshejwe beto y'icyuma (reinforced concrete). Imbibi z’iburasirazuba n’iburengerazuba zuzuzwe n'ibyuma bishushanyijeho amabara y'ifeza, bifasha gushyigikira igorofa rirambitse (cantilevered floor) kandi bikanagenzura uburebure bw'icyerekezo cy'amaso ku majyepfo. Ahantu ho kubana ku igorofa rya kabiri hafunguriramo kuri terasi ifite ubwiza bw'ibyerekezo bihagije.
Izina ry'umushinga : Wedge House, Izina ryabashushanya : Kiyoshi Sugimoto, Izina ry'abakiriya : Masato Ikuta.
Igishushanyo cyiza nuwatsindiye igihembo cyumuringa mububatsi, kubaka no guhatanira imiterere. Ugomba rwose kubona ibihembo bya bronze byegukana ibishushanyo mbonera bya portfolio kugirango umenye ibindi byinshi bishya, bishya, byumwimerere kandi bihanga imyubakire, inyubako nuburyo bwo gukora.
