伸成工業（株）

A precision machining company specializing in aluminum components, including complex shapes, thin plates, and small-diameter holes. The firm also performs aluminum grinding and supplies precision parts for semiconductor equipment, capacitor manufacturing equipment, food-processing machinery, medical devices, and optical systems. It supports prototype work and small-batch production for parts up to approximately 400 × 800 mm and under 20 kg. Other processed materials include steel, stainless steel, copper, and select specialty materials.