Yamaoka Co., Ltd. operates seven factories in Fukuyama City, Hiroshima Prefecture, each equipped and organized to meet specific product requirements. From high-precision injection molding to electronic assembly and precision machining, each plant plays a dedicated role within our fully integrated in-house production system, enabling both high quality and short lead times. Below is an overview of each factory’s features and capabilities.
| Molding Machines | 40t–180t, total 8 units |
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| Main Product Areas | Electrical and electronic components, building materials, automotive parts |
Plant No. 1 primarily handles small to medium-sized plastic molding. With a diverse lineup of molding machines, it offers flexible production capabilities. Under a stable quality control system, a wide range of products is produced efficiently and reliably.
| Molding Machines | 130t–450t, total 7 units |
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| Main Product Areas | Building materials, electrical and electronic components, automotive parts |
Plant No. 2 is equipped with PVC-dedicated machines ranging from 130t to 450t, supporting the molding of toilet-related products and electrical installation components. Its high adaptability through screw replacement allows for flexible material handling, enabling high-precision molding even for products with complex design requirements.
| Main Operations | Assembly of piping components (high-mix, low-volume production) |
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Plant No. 3 features a dedicated assembly floor that integrates multiple processes such as buffing, heat staking, pressing, and bonding. Crane equipment is also installed, allowing even large products to be handled safely and efficiently from single-unit production.
| Molding Machines | 140t and 220t, total 3 units |
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| Main Product Areas | Automotive fuel pump components, electrical and electronic components |
This floor specializes in molding fuel pump parts and electronic components that require high precision. High-torque caulking operations using both hydraulic and pneumatic systems are available, ensuring a fully integrated and rigorously controlled quality process.
| Main Operations | Assembly of electronic devices (spot welding, soldering, etc.) |
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This floor is responsible for the final assembly of electronic components. It supports spot welding and precision soldering, and all products undergo continuity and functional testing before shipment, delivering high-quality electronic products.
| Main Operations | Assembly of piping components (high-volume, stable production) |
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Working in coordination with Plant No. 3, Plant No. 5 focuses on the rapid assembly of high-volume products, ensuring consistent and stable output. By maintaining high standards of quality and delivery, it achieves a well-balanced and flexible production flow.
| Main Operations | Quality Assurance Department, Sample Warehouse |
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| Molding Machines | 130t–860t, total 6 units |
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Plant No. 7 handles advanced molding for large products and special materials. With proprietary program control, it achieves both high-level technical performance and consistent quality, even for highly demanding products.
