ORIGINAL ENGINEERING CONSULTANTS CO.,LTD.
4642・Standard Market・Services
Business
Original Sekkei Co., Ltd. is a construction consultant specializing in water supply and sewerage, founded in 1962. It operates offices nationwide and its core business consists of surveying, planning, detailed design, and construction supervision of water supply and sewerage facilities. Its main customers are local governments and public institutions such as the Japan Sewage Works Agency, with the public sector accounting for 98.6% of sales. In January 2025, the company made Crux System Co., Ltd. a subsidiary, establishing a new Information Processing Services Business, and in July of the same year brought Nippon Technical Service Co., Ltd. into the group as well, expanding its business domain into the water supply and sewerage DX and IT fields. Consolidated net sales were ¥8,515 million (FY2025, ending December 2025).
Business Model
An order-based business model in which the company receives orders for design and supervision services for water supply and sewerage infrastructure from local governments, the Japan Sewage Works Agency, and others, recognizing revenue as completed work value. The Construction Consultant Business maintains a high segment profit margin of 13.7%. The order backlog has reached its highest level in the past five fiscal periods, providing high revenue visibility through advance order-taking. The Information Processing Services Business (net sales of ¥1,008 million) currently has a low profit margin of 1.7%, but the company aims to improve profitability by achieving economies of scale and expanding the ratio of outsourced sales.
Company Strengths
Since its founding in 1962, the company has built up more than 60 years of track record as a construction consultant specializing in the water supply and sewerage field. It has obtained ISO9001, ISO14001, ISO55001, and ISO27001 certifications, institutionally ensuring technical quality. It operates multiple regional offices nationwide and achieves a high repeat order rate by thoroughly understanding the facility development status and business challenges of local governments.
The order backlog for FY2025 (ending December 2025) reached ¥6,197 million, a record high over the past five fiscal periods. Even the Construction Consultant Business alone secured an order backlog of ¥6,023 million. Against a backdrop of Disaster Recovery Support Services related to the Noto Peninsula earthquake and demand for national resilience enhancement and aging infrastructure countermeasures, orders for water supply projects have also grown, functioning as a leading indicator supporting revenue in future periods.
Net assets at the end of FY2025 (ending December 2025) stood at ¥7,898 million, composed mainly of retained earnings. Cash and cash equivalents were secured at ¥3,548 million. Although the company carries long-term borrowings related to M&A (fixed liabilities of ¥2,372 million), the scale of net assets is large and financial soundness is maintained. Capital expenditure was kept restrained at ¥201 million, indicating no excessive capital spending relative to cash-generating capacity.
ENVALITH's Perspective
Performance Trend
Net sales grew for five consecutive fiscal years, from ¥6,207 million in FY2021 to ¥8,515 million in FY2025. Growth accelerated in Q1 FY2026 (ending December 2026), with net sales of ¥3,290 million (up 28.4% year on year), driven by the twin engines of the consolidation effect of Crux System (Information Processing Services Business: ¥328 million) and organic growth in the Construction Consultant Business (¥2,962 million). The operating margin remained at a high level, rising from 10.8% in FY2025 to 20.5% in Q1 FY2026 (ending December 2026). Externally, stable securing of the Reiwa 8 budget and structural expansion in demand for renewal of aging infrastructure are underpinning performance. The full-year forecast remains unchanged at net sales of ¥9,600 million (up 12.7% year on year) and operating income of ¥1,000 million (up 8.5% year on year).
Growth Strategy
Pursuing sustainable growth through group expansion via M&A and the development of DX and public-private partnership businesses
Promoting stable order intake from major clients and proposing development projects centered on the CLAX system. Aiming to improve profit margins by developing requirements-definition and proposal personnel and strengthening management functions. In Q1 FY2026 (ending December 2026), the business recorded net sales of ¥328 million with a profit margin of approximately 6.0%.
With Water PPP adoption expected to become a requirement for utilizing the Comprehensive Social Infrastructure Development Grant from FY2027 (ending March 2027) onward, public-private partnership support services for small and medium-sized municipalities have been positioned as a priority area for order-taking activities. Disaster Recovery Support Services related to the Noto Peninsula earthquake continue to be received.
In collaboration with business partners, the company is developing multiple business plans into concrete form, including a Web GIS tool utilizing PLATEAU (3D city model) promoted by the Ministry of Land, Infrastructure, Transport and Tourism, an urban planning consensus-building solution, and a resident collaboration platform for maintaining social infrastructure. Discussions are proceeding through a working group with participation from group companies.
With the increase in group companies, a new recruitment group was established within the General Affairs and Human Resources Department to strengthen new graduate and career hiring. The open corporate culture fostered by "President's Exchange Meetings" held at 12 locations has been well received in career hiring and has contributed to hiring results. Securing a stable pool of engineers is a prerequisite for expanding order intake.
Last updated: July 17, 2026