ミヨシ Company Overview

We provide comprehensive support for prototype and small-lot production of plastic products!

Miyoshi Co., Ltd. has been involved in the prototyping and small-lot production of plastic products since its establishment in 1972. Currently, we manufacture molds using aluminum alloys for small-lot production and steel materials for plastic molds for mass production, and we produce final products with three molding machines. Our molding machines include a 40-ton vertical type and 80-ton and 230-ton horizontal types, accommodating a variety of products. We also handle necessary manual processes after molding, such as terminal insertion and potting. With the technology we have cultivated over many years in prototyping, we are a company that can collaborate with customers to create products. To provide only the truly necessary quantities, we offer consistent support from mold production to small-lot and semi-mass production according to desired quantities. 【Examples of Production】 Automotive parts, packaging materials, medical device components, home appliance products, robot enclosures, etc. 【Ideal for the following types of products】 - Prototypes and development items that are expected to undergo multiple shape changes - Products that require several dozen to around 1,000 units at a time but are intended for long-term use - Products that require a maximum of about 10,000 units