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At Suwa Nichiai Seiko, we carry out a wide range of metal parts processing, mainly aluminum cutting processing such as die casting and casting.
We have a wide range of equipment necessary for cutting (MC processing, NC processing) and polishing (flat surface polishing, cylindrical polishing), and by working together with partner factories, we are able to provide an integrated production service from material procurement to various processing, and we are working to achieve high precision, low cost, and quick delivery.
We have also introduced a 3D measuring machine, and we have put in place thorough inspection and quality control systems. We will continue to do our best to meet all of our customers’ needs, including budget and delivery requirements, and to ensure their satisfaction. We handle a wide range of work, from prototyping to mass production, so please feel free to contact us for a free estimate.



Company profile
Company name | Suwa Nichiai Seiko |
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Representative | Toshiaki Saza |
Location | 2-4-50 Osachikatama-cho, Okaya City, Nagano 394-0084 |
TEL | 0266-28-5838 0266-28-5838 |
FAX | 0266-28-5815 |
info@suwa-nichiai.co.jp | |
Business hours | 9:00~17:00 |
Regular holidays | Saturdays, Sundays, and national holidays |
Business items | Machining parts including industrial robot parts, optical parts, and aluminum parts, machining using CAD/CAM, and precision machining using NC lathes. We can also provide quick support for prototyping, mass production, and single-piece processing. |
Capital | 5 million yen |
Date of establishment | November 1981 |
Responsible minerals procurement policy
We do not procure minerals from conflict zones or high-risk areas
The profits generated by the mining and trading of minerals in conflict and high-risk areas provide a source of funding for armed groups and rebel forces.
There are also cases where it can lead to money laundering, environmental destruction, and fraudulent transactions.
We recognize that such mineral-related issues are important social issues, and we do not procure minerals from conflict zones or high-risk areas where there is a risk of human rights violations or support for armed groups.
We identify and assess risks in accordance with the due diligence guidance set out by the Organisation for Economic Co-operation and Development (OECD), and we carry out responsible procurement.
8 minutes by car from Shimosuwa Station on the JR Chuo Main Line