Ring Co., Ltd. — a Japan-headquartered precision manufacturer founded in 1989. From design support to mold making, injection, press, assembly, automation, diecast, and proprietary speakers, we deliver one-stop manufacturing across 6 countries and 8 sites.
Design support, precision molds, plastic injection & metal press, automation, assembly, and diecast — all under one corporate roof.
VA/VE proposals, modeling, prototyping, and quality planning — supporting your idea from day one.
Press, injection, and cassette molds for sheet thicknesses 0.05–2mm. In-house design through trial.
Progressive press, insert molding. Monthly output 20M units including world's smallest tactile switches.
Inspection, cleaning, and assembly lines designed and built in-house for our customers' production.
Hybrid auto / semi-auto / manual assembly with cleanroom and ESD facilities. 800-staff SEA capacity.
Aluminum, zinc, magnesium alloys. 1–2mm thin-wall heatsinks for EV power semiconductors.
1M units/month for global Tier-1 automotive OEM. IATF 16949 supply, 98.8% yield, 100% on-time delivery (3 years).
30% weight reduction for EV power semiconductor heatsinks while maintaining thermal performance.
ISO 13485 manufacturing in Class 100,000 cleanroom. Validation-ready, full traceability.
| Site | Country | Staff | Specialty |
|---|---|---|---|
| Headquarters | Japan / Yao, Osaka | 100 | Mold, design, sales, automation |
| Showroom & Sales | Japan / Yao | — | Permanent product display |
| Kumamoto Plant | Japan / Kumamoto | 100 | Medical devices (ISO 13485), 24h electric injection |
| Shenzhen Plant | China / Shenzhen | 500 | Automotive (IATF 16949), SONY-GP certified |
| Jieyang Plant | China / Jieyang | 151 | Twincoil speakers, 8 assembly lines |
| Cambodia Plant | Cambodia / PPSEZ | 800 | Connector / switch ESD-cell assembly |
| Philippines Plant | Philippines / Cavite | 45 | Semi-auto injection, ISO 9001 (2022) |
All sites certified.
CO2 reduction roadmap to 2030.
Kumamoto plant; Class 100,000 cleanroom.
Shenzhen plant; PPAP-ready.
English-speaking sales engineers respond within 3 business days. NDA available before sharing CAD/specs.