NIPPON DENSETSU KOGYO CO., LTD.
1950・Prime Market・Construction
Business
Nippon Densetsu Kogyo is a major specialist in electrical and telecommunications construction, established in 1942 at the request of the Ministry of Railways. Its business consists of a single segment, construction work, spanning four divisions: railway electrical construction (train lines, power generation/substations, signaling, etc.), general electrical construction (building electrical facilities), telecommunications construction, and environmental energy construction. Its main customers are railway operators, led by JR East, which accounts for 48.1% of consolidated net sales of ¥229,207 million. The group structure, comprising 17 subsidiaries and 5 affiliated companies, provides an integrated service covering design, construction, maintenance, and infrastructure sharing.
Business Model
The company's main revenue source is contract construction work, with railway electrical construction (88.4% sole-source contracts) forming a stable earnings base due to its high proportion of negotiated (non-competitive) orders. An abundant order backlog (¥224,253 million at the end of FY2026 (ending March 2026)) underpins sales in subsequent periods, with revenue recognized using the percentage-of-completion method from order receipt through construction and completion. The company also operates related businesses such as real estate leasing, maintenance and inspection, and materials sales, which function as a buffer against fluctuations in construction volume.
Company Strengths
The Railway Electrical Construction segment's ratio of orders received through sole-source (negotiated) contracts reached 88.4%, with completed construction work for JR East accounting for ¥110,181 million on a consolidated basis (48.1% of net sales). Since its founding in 1942, the company has accumulated over 80 years of track record and technical expertise in railway electrical construction, forming an entry barrier that competitors find difficult to replicate in a short period.
In FY2026 (ending March 2026), consolidated orders received of ¥267,369 million and consolidated order backlog of ¥224,253 million both renewed record highs for the third consecutive period. Orders received in the General Electrical Construction segment reached ¥89,219 million, up 51.7% year on year, and the substantial backlog of contracted work structurally underpins sales and profit from the following period onward.
The company operates four segments—Railway Electrical Construction, General Electrical Construction, Information and Communication, and Environmental Energy—establishing a structure in which fluctuations in orders in any particular segment can be offset by the other segments. In FY2026 (ending March 2026), net sales in the Information and Communication Construction segment increased 10.6% year on year, and net sales in the Environmental Energy Construction segment increased 10.9% year on year, indicating that segments other than railway are also growing steadily.
ENVALITH's Perspective
Performance Trend
Revenue increased for the fifth consecutive fiscal year since FY2022 (ending March 2022), reaching ¥229,207 million in FY2026 (ending March 2026), up 5.7% year on year. Operating profit was ¥23,560 million (up 31.4% year on year), and profit attributable to owners of the parent was ¥18,060 million (up 36.9% year on year), with profit growth significantly outpacing revenue growth. Amid tailwinds from continued safety investment by railway operators, redevelopment in major metropolitan areas, and robust data center construction investment as external factors, efficient execution of a substantial backlog of carried-over projects drove margin improvement. For FY2027 (ending March 2027), the company forecasts revenue of ¥242,310 million and operating profit of ¥23,890 million, expecting to maintain the trend of increasing revenue and profit.
Growth Strategy
Under the "Nippon Densetsu 3-Year Management Plan 2024," the company aims for sustainable growth by deepening its core business areas while venturing into new fields.
The company continues organized sales activities targeting JR group companies as well as public and private railway operators, reliably capturing demand for safety and stable transport investment. In FY2026 (ending March 2026), orders received in the railway electrical construction segment reached ¥137,016 million (up 14.1% year on year), with the order backlog steadily accumulating to ¥102,603 million (up 19.7% year on year).
The company is pursuing proactive sales activities in response to demand from large-scale redevelopment around stations, renewal of aging facilities, and data center construction. In FY2026 (ending March 2026), orders received in the general electrical construction segment expanded rapidly to ¥89,219 million (up 51.7% year on year), while the order backlog grew to ¥93,231 million (up 36.0% year on year), securing future sales in advance.
The company is promoting proposal-based sales in the renewable energy and grid-connected battery storage fields aimed at realizing a decarbonized society, while also expanding an integrated infrastructure-sharing service covering planning, construction, and maintenance. Orders in the environmental energy construction segment declined due to the reaction from a large-scale order received in the previous period, while the information & communications construction segment continued to expand steadily, with net sales of ¥31,148 million (up 10.6% year on year).
Under the banner of "Team NDK," the company is promoting support for talent acquisition and development among partner companies, while strengthening its construction execution system through proactive DX implementation by each employee and productivity-enhancing investments. Maintaining quality and safety standards amid an expanding volume of construction work is positioned as the most critical challenge.
Last updated: July 19, 2026