Our philosophy

At Yoshiwa Kogyo, we clearly define three foundational principles: our Management Philosophy as the basis of our corporate activities, our Quality Philosophy to guide our growth through customer trust, and our Environmental Philosophy to balance social responsibility and business activities.
Guided by these values, we continuously take on challenges to achieve a better tomorrow.
Fulfilling the expectations of all stakeholders and contributing to a sustainable society is our mission.

Our philosophy

Management Philosophy

At Yoshiwa Kogyo Co., Ltd., we are committed to “Taking on the Challenge for a Better Tomorrow”

as we strive to become a company of lasting value.
We aim to deliver products that meet market needs in a timely manner, contribute to emotionally engaging car manufacturing, and create an open workplace where individuals can freely express themselves.
Through continued growth, we seek to bring joy to everyone connected to our company.

Spirit of Challenge

Toward a Better Tomorrow

Each of us acts with a clear sense of purpose and an unwavering drive for improvement, always aiming to be better today than yesterday, and better tomorrow than today.

A Global Perspective

As a leading casting manufacturer, we actively expand business opportunities worldwide—through our products, technologies, and organizational capabilities.

Technical Expertise

Exploring the Limits of Casting

Building on our long history of casting expertise, we continue to refine our techniques and explore new technologies that go beyond traditional casting.

Trusted Manufacturing Capabilities

We maximize the skills and know-how cultivated over many years to meet demanding quality standards and enhance our credibility as a manufacturer of automotive parts.

Organizational Strength

Agility and Structure

We promote active participation from all employees and pursue a management style that balances swift responsiveness with steady planning.

An Open and Expressive Workplace

We aim to create an environment where everyone involved with Yoshiwa Kogyo can pursue a better tomorrow through free and open self-expression.

Quality Philosophy

At Yoshiwa Kogyo Co., Ltd., we strive to be a No.1 quality-driven company to gain lasting trust from our customers and ensure long-term growth.

Our core products—cast iron automotive parts—are essential structural components widely used in vehicle manufacturing.
In many applications, they serve as critical safety parts directly linked to user safety and life.
We recognize this responsibility and actively engage in quality assurance and improvement.

Customer Satisfaction

Preventing Defects

We work to prevent defects across the entire automotive supply chain and achieve all established quality objectives.

Enhancing Satisfaction

By fulfilling our roles with precision, we aim not only to meet required standards but also to deliver “delightful” quality that exceeds customer expectations.

Quality Management Systems

Building a Management System

To achieve quality objectives, we implement a quality management system across all relevant departments.

Enforcing Quality Policies

We document our quality policies and ensure full awareness among employees. Management regularly reviews them.

Continuous Improvement

Ongoing Quality Improvement

We continuously improve our quality management system and performance by operating and reviewing the system regularly.

Quality Stabilization

We control quality variation within acceptable limits and work to reduce the Cost of Poor Quality (COPQ).

Environmental philosophy

At Yoshiwa Kogyo Co., Ltd., we aim to be an environmentally friendly company that contributes to a livable planet and a rich natural environment.

Although our main business—manufacturing pig iron castings—is a recycling industry that uses iron scrap as raw material, it also consumes large amounts of energy and generates considerable industrial waste.
We are fully aware of this impact and strive to reduce environmental burdens by applying and improving our production technologies.

Social Responsibility

Energy and Waste Reduction

We promote energy saving both in production and administration, and work to reduce CO₂ emissions and other environmentally harmful substances.

Compliance with Environmental Regulations

We comply not only with all relevant laws and regulations but also with environmental agreements and commitments we have made.

Environmental Management Systems

We build and operate environmental management systems to ensure that our environmental goals are met in all areas of activity.

Policy Awareness and Public Disclosure

Our environmental policies are documented and shared with all employees and affiliated companies, and are also publicly available.

Environmental Management PDF

Ongoing Development

By operating and reviewing our environmental management systems, we work toward continuous improvement in environmental performance and pollution prevention.

Harmony Between Industry and Environment

As a company operating in an environmentally impactful industry, we actively seek harmony with our surrounding environment and communities.

Declaration of Partnership Building

We declare our commitment to strengthening partnerships by promoting mutual growth with our suppliers and value-creating business partners.
We focus on the following key initiatives:

1. Mutual Prosperity and Cross-Industry Collaboration
We aim to raise the value of the entire supply chain by collaborating beyond company size or business group.
This includes supporting partners with telework implementation, BCP planning, and carbon neutrality efforts across the supply chain.

2. Compliance with Fair Trade Practices ("Promotion Standards")
We adhere to the "Promotion Standards" of the Subcontract Act and work to eliminate unfair practices:

① Fair Pricing:
We do not make unreasonable cost-cutting demands. Pricing decisions are made through at least annual discussions that consider fair profits and labor cost adjustments.

② Tooling Costs:
We follow national guidelines regarding mold transactions and do not request free storage of molds or impose unnecessary burdens on suppliers.

③ Payment Terms:
We aim to pay in cash whenever possible. If promissory notes are used, we ensure payment within 60 days and cover any related fees.

④ Intellectual Property:
We respect suppliers' IP rights and avoid forced disclosures or one-sided agreements regarding confidential information.

⑤ Work Style Reforms:
We avoid last-minute order changes and unreasonable deadlines. In the event of disasters, we strive to maintain fair and considerate business relationships.

December 25, 2024
Masahiro Yoshino
President and Representative Director
Yoshiwa Kogyo Co., Ltd.