A-ONE SEIMITSU INC.
6156・Standard Market・Machinery
Collet Chuck Division
Core segment responsible for the manufacturing and sale of collet chucks for CNC automatic lathes (approximately 69% of net sales)
| Period | Current | Previous | Change |
|---|---|---|---|
| Net sales (cumulative nine months of FY2026 ending June 2026) | ¥827 million | ¥823 million (cumulative nine months of FY2025 ending June 2025) | ↑ |
| Segment profit (cumulative nine months of FY2026 ending June 2026) | ¥305 million | ¥300 million (cumulative nine months of FY2025 ending June 2025) | ↑ |
| Segment profit margin (cumulative nine months of FY2026 ending June 2026) | 36.9% | 36.5% (cumulative nine months of FY2025 ending June 2025) | ↑ |
| Net sales year-on-year change | +0.5% | — | ↑ |
| Segment profit year-on-year change | +1.8% | — | ↑ |
| Net sales (full year FY2025 ending June 2025) | ¥1,106 million | — | — |
| Segment profit (full year FY2025 ending June 2025) | ¥406 million | — | — |
Business Details
Manufactures and sells collet chucks and guide bushings used primarily in CNC automatic lathes, as well as collet chucks for dedicated machines. These are precision tools used for gripping bar-shaped materials and suppressing run-out, requiring repeat accuracy and durability. Backed by more than 50 years of track record, the division supplies domestic and overseas customers across diverse industries including automobiles, semiconductors, and machine tools, securing stable orders through repeat orders as consumable items. In the cumulative nine months of FY2026 (ending June 2026), increased orders for collet chucks used in machining semiconductor inspection probe components for China served as the driving force.
Recent Overview
Driven by increased orders for collet chucks for China-bound semiconductor inspection use, cumulative net sales rose 0.5% year on year
In the cumulative nine months of FY2026 (ending June 2026) (July 2025 to March 2026), net sales were ¥827 million (up 0.5% year on year) and segment profit was ¥305 million (up 1.8% year on year). Orders increased for collet chucks used in machining semiconductor inspection probe components amid increased semiconductor production in China, and there was activity in semiconductor manufacturing and inspection equipment components, automotive applications where tariff concerns had settled down, and machine tool applications driven by overseas exports. Meanwhile, domestic sales declined slightly as orders remained centered on small-lot, multi-product single-item orders. The start of January was gradual, with orders trending upward from February through March. Medical parts also showed stable movement.
Key Products
Growth Drivers
- Increased orders for collet chucks used in machining semiconductor inspection probe components amid increased semiconductor production, particularly centered on China
- Expanding demand for semiconductor manufacturing and inspection equipment (demand for high-spec semiconductors driven by AI adoption)
- Steady trend in hybrid vehicle parts machining (return to HVs amid sluggish EV growth)
- Recovery in machine tool demand driven by overseas exports
- Stable order base structure through repeat orders as consumable items
- High technical reliability and a strong customer base built on more than 50 years of track record
- Stable demand for medical parts
Risks
- Sluggish domestic orders due to deteriorating business conditions among small and medium-sized domestic manufacturers (domestic demand centers on small-lot, multi-product single orders and trends slightly downward)
- Risk of order fluctuations due to capital expenditure restraint and production adjustments by major manufacturers
- Instability in demand for machine tools and automobiles due to trade friction such as high U.S. tariff measures
- Adverse effects on manufacturing overall from rising crude oil and energy prices due to sudden changes in the Iran situation, closure of the Strait of Hormuz, etc.
- Seasonality and fluctuation risk as orders repeatedly rise and fall on a monthly and quarterly basis
- Heightened geopolitical risk accompanying increased dependence on China-related semiconductor demand
Last updated: September 29, 2025

