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クニミネ工業株式会社 logo

KUNIMINE INDUSTRIES CO., LTD.

5388Standard MarketGlass & Ceramics Products

クニミネ工業株式会社 logo
KUNIMINE INDUSTRIES CO., LTD.5388

Bentonite Business

Kunimine Industries' core segment. Manufactures and sells bentonite for foundry/molding materials, environmental/construction use, and pet applications.

PeriodCurrentPreviousChange
Net Sales (External Customers)¥11,842 million¥11,094 million
Segment Profit¥1,289 million¥1,074 million
Segment Assets¥12,961 million¥14,468 million
Depreciation¥472 million¥419 million
Increase in Property, Plant and Equipment and Intangible Assets¥642 million¥708 million
Segment Profit Margin10.9%9.7%

Business Details

The core business handling everything from bentonite ore mining to manufacturing and sales. Consists of three fields: foundry/molding materials (for construction machinery and trucks), environmental/construction (for civil engineering and construction, geothermal power generation, and radioactive waste treatment), and pet litter sand. Includes domestic and overseas mining subsidiaries (Kunimine, Kawasaki Mining, Kanben Mining), sales subsidiaries (Kunimine Marketing, KUNIMINE (THAILAND)), and an overseas investment company (TRANS WORLD PROSPECT CORPORATION). The largest segment, accounting for approximately 69% of consolidated net sales.

Recent Overview

Higher sales and profit driven by demand recovery in the foundry/molding materials and environmental/construction fields and price revision effects. Sales declined in the pet field.

In the Bentonite Business for FY2026 (ending March 2026), net sales were ¥11,842 million (up 6.7% year on year) and segment profit was ¥1,289 million (up 19.9% year on year), representing higher sales and profit. The foundry/molding materials field saw increased sales due to a recovery trend in demand for construction machinery and trucks and price revision effects. In the environmental/construction field, strong geothermal-related demand and price revision effects offset sluggish general civil engineering work, resulting in increased sales. In the pet field, sales decreased due to reduced shipments to some customers following price revisions. Segment assets decreased by ¥1,507 million year on year to ¥12,961 million, due to a decrease in inventory and other factors.

Key Products

product
Bentonite for Foundry/Molding Materials

A core product with a high market share for domestic foundry manufacturers. Primarily driven by demand for construction machinery and trucks, with expansion into overseas markets also being promoted. Net sales for FY2026 (ending March 2026) were ¥7,185 million (up 6.7% year on year).

product
Bentonite & Water-Sealing Materials for Environmental/Construction Use

Deployed for domestic infrastructure development projects and geothermal power generation projects. Active sales activities are also being conducted for the radioactive waste treatment business. Net sales for FY2026 (ending March 2026) were ¥3,800 million (up 11.7% year on year). Despite sluggish demand for general civil engineering work, sales increased due to strong geothermal-related demand and the effect of price revisions.

product
Bentonite-Based Pet Litter Sand

A field aiming to expand profitability through the enhancement of related products leveraging the company's own strengths. Net sales for FY2026 (ending March 2026) were ¥855 million (down 10.4% year on year). Sales decreased due to reduced shipments to some customers following price revisions.

product
Mud Conditioning Agent (Trading)

Sold as a complementary product to the Bentonite Business through purchase and resale. Offered as a drilling mud conditioning agent for civil engineering and construction work.

Growth Drivers

  • Recovery trend in demand for construction machinery and trucks in the foundry/molding materials field
  • Expansion of demand for geothermal power generation and radioactive waste treatment projects in the environmental/construction field
  • Effects of appropriate price revisions (sales price optimization) in each field
  • Expansion into the ASEAN market and overseas markets through KUNIMINE (THAILAND)
  • Promotion of capturing infrastructure development projects related to national resilience
  • Stable resource securing through mining area development investment and mining technology development
  • Expanded sales of related products and enhanced technical services leveraging high domestic market share in the foundry/molding materials field

Risks

  • Structural shrinkage of domestic foundry/molding materials demand due to a decrease in the number of cast parts amid the shift to EVs in the automotive industry
  • Deterioration in automotive industry performance, decreased exports to the US, and reduced production volumes due to the impact of Trump tariffs
  • Continued sluggish demand for general civil engineering work and shipment fluctuations due to delays in the construction period of large-scale public works projects
  • Cost increase pressure from persistently high prices for imported ore and various raw materials
  • Foreign exchange fluctuations (impact on foreign-currency-denominated procurement costs for imported ore)
  • Risk of reduced shipments to some customers in the pet-related field due to price revisions
  • Structural cost increases such as labor shortages and rising logistics costs

Last updated: July 3, 2026