SUMIKEN MITSUI ROAD CO.,LTD.
1776・Standard Market・Construction
Business
Mitsui Sumiken Dorokk Co., Ltd. was founded in 1948 and took its current name in 2003 following the merger of Mitsui Doro and Sumiken Doro; it is a TSE-listed company specializing in road construction. Centered on its construction business (paving, civil engineering, and building construction), the company also operates a construction materials manufacturing and sales business (asphalt mixtures, etc.) and a solar power generation and electricity sales business. Its major customers include public-sector entities such as the Ministry of Land, Infrastructure, Transport and Tourism and expressway operating companies, as well as major private developers such as Mitsui Fudosan, Nomura Real Estate, and Sumitomo Forestry, and it has a base of sole-source orders for residential land development work. Consolidated net sales for FY2025 (ended March 2025) were ¥30,157 million.
Business Model
In the construction business, the company receives orders for paving and civil engineering works from the Ministry of Land, Infrastructure, Transport and Tourism, expressway operators, and private developers, recognizing revenue as completed construction contracts. In the manufacturing and sales business, the company produces asphalt mixture at its own plants for external sales while also supplying its internal construction business, forming a vertically integrated structure. The ratio of negotiated (sole-source) contracts in civil engineering works is as high as 99.9%, forming a stable order base.
Company Strengths
In FY2025 (ending March 2025) (78th fiscal year), the order-method breakdown showed a negotiated-contract (non-competitive) ratio of 99.9% for civil engineering works and 76.9% for asphalt paving works. Continuous business relationships with major developers such as Mitsui Fudosan, Nomura Real Estate, and Sumitomo Forestry form a stable order base that does not rely on competitive bidding.
The company operates a vertically integrated model combining in-house asphalt mixture manufacturing (sales volume of 414,141 tons and net sales of ¥4,679 million in the 78th fiscal year) with construction execution. It continues to invest in the Higashimatsuyama mixture plant (acquisition cost of ¥558 million) to maintain and strengthen manufacturing capacity.
The company has a track record of continuously winning and completing large-scale projects for government agencies and infrastructure operators, including paving work on the Hokkaido Transverse Expressway for the Ministry of Land, Infrastructure, Transport and Tourism's Hokkaido Development Bureau, apron paving work at Kansai International Airport for Kansai Airports, and runway renewal work at Kumamoto Airport.
ENVALITH's Perspective
Performance Trend
Revenue peaked at ¥31,535 million in FY2022 (ending March 2022) and has declined for five consecutive periods, reaching ¥29,170 million in FY2026 (ending March 2026), down 3.3% year on year. Operating profit, however, recovered sharply to ¥641 million (versus ¥224 million in the prior period, up 186% year on year). Gross profit margin improved to 10.5% (from 8.2% in the prior period), driven by expanded orders for civil engineering work and strengthened project management with a focus on profitability. Amid continued high construction material prices and rising labor costs as external factors, progress in price pass-through also contributed to the earnings improvement. Profit attributable to owners of parent recovered to ¥392 million (from ¥167 million in the prior period), though it should be noted that a ¥137 million adjustment to income taxes (reversal of deferred tax assets) increased the tax burden.
Growth Strategy
Promoting improved profitability, efficiency, and enhanced corporate value through the Medium-Term Management Plan 2025-2027
While prioritizing safety above all else, the company has thoroughly implemented construction management that balances quality improvement with cost reduction. The construction business segment margin improved to 11.4% in FY2026 (ending March 2026) from 8.7% in the prior period, reflecting the effects of these measures in the figures.
Amid continued high raw material and energy prices, the company is implementing price pass-through commensurate with costs while strengthening sales capabilities to expand market share. In FY2026 (ending March 2026), sales in the manufacturing and sales business reached ¥5,737 million (up 4.3% year on year), with segment profit of ¥384 million (up 31.0% year on year), showing continued improvement.
In the road construction industry, where chronic labor shortages are becoming increasingly severe, the company aims to secure construction quality maintenance and improvement as well as competitiveness by strengthening the development of next-generation talent and engineer training. This is positioned as a key initiative under the Medium-Term Management Plan 2025-2027.
The company is implementing environmentally conscious capital investment while promoting the introduction of alternative fuels to replace fossil fuels, aiming to reduce manufacturing costs and CO2 emissions. This is expected to contribute to strengthening the competitiveness of the manufacturing and sales business and improving the cost structure over the medium to long term.
Last updated: July 17, 2026