We design and install for air conditioning facilities construction focusing on office buildings.

Office Building


We have established a specialized construction management system (special team) for office buildings. By taking advantage of the trust relationship that we have built up with developer and general contractor clients, we are promoting speedy proposal-style sales activities to increasing orders.

Powerful Procurement Ability

Our group company, Mitani Sangyo Constructions Co., Ltd. as a dealer of makers including DAIKIN INDUSTRIES, ltd., not only exercises our procurement ability of air conditioning systems for office building, but also provides finely-tuned service from installation to after-care maintenance to our customers.

Mitani Sangyo Constructions


In the recent years, because of the increase of super-insulated articles in condominium, the balance of ventilation, the faculty of bathroom drying machines and room air conditioners are highly regarded. Based on the opinions that we directly heard from residents of condominiums which we installed in the past, we try our best to provide the air conditioning systems comfortable for living.

Construction Projects

A Shibuya-Higashi 1-choume project Tokyo 25 floors 52,750㎡
B Kasumigaseki 3-choume project, new construction Tokyo 17 floors 19,998㎡
C PMO Akihabara project Tokyo 8 floors 4,020㎡
D Jingu-mae 2-choume project Tokyo 20 floors 18,900㎡