- Telephone number: +81-3-3617-5580
- FAX: +81-3-3613-5547
- Website
With over 70 years of experience, we are a domestically-based spring manufacturer that goes beyond mere metal plastic processing. Our operations encompass in-house mold design and manufacturing divisions, as well as heat treatment departments. This allows us to establish a comprehensive mass production line, offering an integrated manufacturing solution from start to finish.
Manufacturing category info
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Thin leaf spring（ Parts manufacturing / Spring ） |
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Coil manufacturing（ Parts manufacturing / Electrical part ） |
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Multi forming（ Mass production / Metal press ） |
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Leaf spring（ Parts manufacturing / Spring ） |
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Conical spring（ Parts manufacturing / Spring ） |
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Battery spring（ Parts manufacturing / Spring ） |
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Copper alloy（ Parts manufacturing / Spring ） |
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Company info
| Company name | Toho Hatsujo Co., Ltd. | Website URL | https://toho-hatujyo.com/ |
|---|---|---|---|
| Street address |
Sumida City Tokyo Japan
[See map] |
Person in charge | horisawa |
| Telephone number | +81-3-3617-5580 | Fax number | +81-3-3613-5547 |
| Capital | 29,000,000 JPY | Employees | 80 |
| Annual sales | EMIDAS Member Number | 1413 | |
| Type of manufacturing | Heavy electric machinery / Transportation equipment / Electrical component for transportation equipment | ||
| Main 3 products |
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PR message
Specializing in precision sheet springs, forming, metal press processing, automotive parts, and low-voltage related products, we excel in transforming challenging projects from prototype to mass production. We proudly handle intricate processing tasks, ensuring every detail is meticulously crafted. Our capabilities are further enhanced by our in-house CAD/CAM-based mold design and manufacturing, allowing us to deliver exceptional quality and precision in every product.
Most recent update：2024-10-31
Manufacturing category info
| Large | Medium | Small |
|---|---|---|
| Designing | Mold designing | Progressive die designing (light electrical) Progressive die designing (auto) General metal press die |
| Die manufacturing | Press die | Designing Manufacturing Part processing Plate machining Die set machining NC data creation Drawing die Bending die Blanking die Forming die Multi forming die Progressive die Single press die Below 60 t 60 - 300 t |
| Die manufacturing | Spring mold | Designing Manufacturing Spring die part processing Wire spring die Leaf spring die |
| Mass production | Metal press | Drawing Bending Blanking Forming Multi forming Transfer press (below 80 t) Iron Stainless steel Aluminum Copper Brass Phosphor bronze Titanium Plated steel plate Stainless steel material for spring Thickness φ0.6mm - φ9.0mm Single press (below 80 t) Single press (80 - 200 t) Progressive press (35 - 80 t) Progressive press (80 - 200 t) |
| Surface treatment | Heat treatment | Stress relief annealing (SR treatment) Air quenching Salt bath quenching Austempering |
| Surface treatment | Barrel polishing | Barrel finishing (vibration) Barrel finishing (rotation) Barrel finishing (centrifugal) |
| Assembly/Inspection | Assembly | Auto parts assembly |
| Parts manufacturing | Electrical part | Coil manufacturing |
| Parts manufacturing | Spring | Thin leaf spring Terminal spring Leaf spring Battery spring Conical spring Spring washer Carbon steel Piano wire (carbon wire) Stainless steel Copper alloy Diameter Diameter |
