KOGI CORPORATION
5603・Standard Market・Iron & Steel
Business
Koki Company Limited is a materials manufacturer founded in 1916 and headquartered in Himeji City, Hyogo Prefecture. Its core business is the Casting Field, which manufactures and sells Steel Rolling Rolls, Molds (for Forging/Special Steel), Automotive Press Die Castings, Dense Bar (Continuous Cast Iron Bar), and other products. This segment accounts for approximately 89% of sales composition. In addition to domestic plants (Himeji East and West Plants), the company also expands overseas through two joint venture subsidiaries in Tianjin and Nantong, China. As remaining businesses, the company operates environment-related equipment and civil engineering contracting (Environment Field – Environmental Engineering) and friction materials for automobiles, railways, and industrial machinery (Environment Field – Functional Materials), under the slogan "Koki: Castings and the Environment." Major customers span a wide range, including domestic electric furnace and blast furnace manufacturers, domestic and overseas automakers, and industrial machinery manufacturers related to shipbuilding, aerospace, and energy.
Business Model
In the core Casting Field, the company produces molds, rolls, and Large Industrial Machinery Castings to order, while handling some Dense Bar (Continuous Cast Iron Bar) and Small Castings through forecast-based production to secure a stable utilization rate. Correcting product sales prices (cost pass-through) together with cost reduction and productivity improvement forms the twin pillars of earnings improvement. The Environmental Engineering segment supplements earnings through contracts for large-scale public works, while the Functional Materials segment does so through the diverse applications of KC Metal Fiber. Capital expenditure funds are procured through long-term borrowings and working capital through short-term borrowings, supplemented by internal funds.
Company Strengths
According to the company's securities report, the continuous cast iron bar "Dense Bar" has continuously expanded its product lineup and maintained/improved quality since production began in 1967, and holds the industry's top share. The extensive manufacturing track record and depth of product lineup built up over many years make imitation by competitors difficult, forming the foundation for securing stable sales both domestically and overseas.
The company possesses the capability to manufacture highly complex, large-scale castings by leveraging full-mold casting technology cultivated over many years. It has introduced the latest flow-thermal-stress coupled analysis (casting CAE) and sand mold 3D printers to ensure high-accuracy quality assurance and shorten development lead times. This directly contributes to winning orders for large machine tool castings destined for overseas aerospace and energy-related applications.
The equity ratio as of the end of FY2026 (ending March 2026) remained stable at 43.2% (42.6% in the previous period), with total net assets reaching ¥19,352 million. The company has concluded specified loan commitment line agreements totaling ¥8,500 million with 10 financial institutions, securing an unused borrowing balance of ¥3,600 million. It has also not breached the financial covenants of its syndicated loan to date, maintaining financial flexibility.
ENVALITH's Perspective
Performance Trend
Revenue expanded sharply from ¥23,117 million in FY2022 (ended March 2022) to ¥26,726 million in FY2023 (ended March 2023), then remained flat at ¥25,963 million in FY2024 (ended March 2024) and ¥26,317 million in FY2025 (ended March 2025), before declining slightly to ¥25,688 million in FY2026 (ending March 2026). Operating profit improved to ¥1,116 million in FY2025 (ended March 2025) but plunged to ¥618 million in FY2026 (ending March 2026). The main causes were a decline in demand for Automotive Press Die Castings, weak demand for semiconductor manufacturing equipment applications, and increased SG&A expenses. External factors such as soaring prices, US trade policy, and the slowdown in the Chinese economy also acted as headwinds. The forecast for FY2027 (ending March 2027) calls for revenue of ¥27,480 million and operating profit of ¥640 million, indicating only a modest recovery.
Growth Strategy
Under the 8th Medium-Term 3-Year Plan "Finding Kai," the company is advancing three key priorities: labor-saving investment, decarbonization, and human resource development
Labor-saving has been positioned as a key priority under the 8th Medium-Term 3-Year Plan, with capital expenditure being actively increased. Expenditure on acquisition of tangible fixed assets in FY2026 (ending March 2026) rose to ¥1,565 million (from ¥1,050 million in the previous fiscal year), aiming to strengthen the profit structure through automation and efficiency improvements in production lines.
Decarbonization has been positioned as a key priority, promoting the receipt of orders for and progress of construction on large-scale projects in the Environmental Engineering segment. In FY2026 (ending March 2026), progress on a large-scale construction project in Kaifu-gun, Tokushima Prefecture led to increased revenue of ¥2,056 million (up from ¥1,893 million in the previous fiscal year); however, the segment loss widened to ¥89 million (from a loss of ¥44 million in the previous fiscal year), and achieving profitability remains an ongoing challenge.
"Human resource development and technical (skills) transfer, enhancement of employee training, and implementation of transfer programs" has been set as a key priority under the 8th Medium-Term 3-Year Plan. Through the transfer of skills from experienced technicians and the development of next-generation personnel, the company aims to maintain and enhance its manufacturing competitiveness over the medium to long term.
To address rising costs of raw materials, electricity, and other inputs, the company continues to promote corrections to product selling prices. In FY2026 (ending March 2026), cost of sales decreased to ¥21,656 million (from ¥22,003 million in the previous fiscal year); however, due to an increase in selling, general and administrative expenses, the operating margin declined to 2.4% (from 4.2% in the previous fiscal year), indicating that the effect of price pass-through remained limited.
Last updated: July 19, 2026

