Integrated manufacturing from plastics injection molding, assembly, inspection to packaging and packing

Kyowa Seiko Co.,Ltd. can provide integrated manufacturing services from development and prototyping production phase to plastics molding, assembly, inspection, packaging and packing in the environment of Class 10,000 clean rooms. We are capable of meeting various needs including medical equipment, cosmetics, healthcare products, optical products, auto components, baby goods, office automation equipments, acoustic equipments, and electronic component.

  • Molding
  • Assemble
  • Inspection
  • Packaging

High-quality manufacturing services provided by accumulated know-how

Highly motivated skillful experts conduct extremely accurate inspections to provide high-quality products. We have accumulated our ingenuity and know-how since the inauguration, which is why we are receiving great customer satisfaction. Also, for even better manufacturing quality, we obtained ISO 9001 certification, registration of medical equipment manufacturing industry, and permission of cosmetics manufacturing industry.

Registration of medical device manufacturing industry(Head office)
Registration of medical device manufacturing industry(Saitama plant)
ISO9001:2015 認証取得
ISO9001:2015 certificate
Permission of cosmetics manufacturing (Cosmetics products in general)(Head office)

Uniquely feminine, considerate skills
and sensitivity brings life to manufacturing

About 80% of our employees are women, who are making the workplace always full of cheerful activity. High-quality products manufactured with accumulated technologies and know-how in such an environment are gaining solid faith and evaluation from our customers.


Contact by e-mail

Contact by phone 048-794-5575 Weekday 9:00~17:00