| Original Engineering Consultants Co., Ltd. | Environment / Mapping/GIS/Remote Sensing / Urban Development / Water Supply and Sewerage | COMPANY PROFILE |
| Osaka Gas Engineering Co., Ltd. | Architecture/Building/Housing / Environment / Elecricity/Energy / Comprehensive Regional Development / Mapping/GIS/Remote Sensing | COMPANY PROFILE |
| Overseas Agro-Fisheries Consultants, Co., Ltd. (OAFIC) | Agriculture/Forestry/Fisheries / Environment | COMPANY PROFILE |
| Overseas Merchandise Inspection Co., Ltd. | Agriculture/Forestry/Fisheries / Inspection/Quality Control / Human Resources/Education / Electricity/Energy / Mining | COMPANY PROFILE |
| Overseas Project Management Consultants,Ltd(OPMAC) | Finance / Industry / Agriculture/Forestry/Fisheries / Transportation / Human Resources/Education |