Cutting edge Japanese precision manufacturing companies

Kagawa Seisakusyo Co.,Ltd.

Prototypes(pressed plate)

Shinkosya CO.,Ltd.

Plating on Plastics

Akiba Die casting Co.,Ltd.

Non-ferrous metal die-casting

Ohmura Seisakusho

High-precision metal cutting

TDC corporation

Super precise mirror polish

Advanced Technologies, Inc.

New technologies for joining resin to metals by chemical bonding

Nichiei Co., Ltd.

Super engineering plastics molding


Precision casting technology without the need of a metallic mold

Muroshima Seiko Co.,Ltd.

Optically high-intensity molding without coating

APPLE Link Co., Ltd.

Solve any problem in gear prototype production!


Prototypes of precision-pressed small parts to assist developers

Costem Corporation

High-precision machining of challenging and complex shapes

Manufacturing of injection molds and injection molding

Muroshima Seiko Co.,Ltd.


At Muroshima, we are engaged in every process of injection molding from mold manufacturing to forming of a product, and accept any order from small lot. A material used for a product can range from a general-purpose material to super engineering plastics.


A mold is machined at high speed, and micro machining is performed with R0.05 of a ball end mill. The unique mold mechanism specially designed for small-lot production is adopted to increase productivity of injection molding while minimizing man-hours required for mold manufacturing. Any material can be used for injection molding, and our products range from mechanism parts to design parts.

Characteristic technologies

A design with realistic texture can be produced by micromachining, more specifically by leather texturing with direct carving. With optically high-intensity molding technology, we can produce solid-color parts in intrinsic colors of resins while design parts in metallic colors resemble parts with metallic coating and in higher color intensity than conventional molded parts. Thus, we can help you produce a brand new design. In prism thick molding, ultra thick molding that is difficult by conventional injection molding is possible, and a transparent resin such as propylene carbonate (PC) can be worked by prism molding that minimizes internal distortion as possible.

惻Field in Industry

Automobile exterior and interior parts, home appliance parts, medical equipment parts, industrial machine parts, aerospace parts, daily equipment parts

Case Study in innovation

The size of molding machines can range from 50t to 550t.
Materials to be used: PP, PE, TPE, PS, ABS, AES, ASA, PC, PA, POM, PMMA, PVC, PPE, PBT, PEEK, PES.
Minimum lot per order: 10 pieces/lot

Prism ultra thick molding that minimizes internal distortion as possible.

Prism ultra thick molding that minimizes internal distortion as possible.

Leather texturing

Leather texturing

Optically high-intensity molding without coating

Optically high-intensity molding without coatingOptically high-intensity molding without coating



Company information

COMPANY NAME Muroshima Seiko Co.,Ltd.