Who We Are
Yokohama has long flourished as a port city connecting Japan with the world. Since its opening to international trade, it has grown into a vibrant global hub where diverse cultures meet and new value is created. Our factory at Nichii is proudly rooted in this dynamic city. Here, people from various nationalities and backgrounds work together, united by craftsmanship and innovation. Through manufacturing, we connect with the world—blending the spirit of Japanese artisanship with modern technology to consistently deliver high-quality products that bring value to customers across the globe.
Our Mission
At JDM, we carry forward the spirit of the Diamond Group through our core philosophy: Sei (精), Ki (気), and Shin (神). These three principles guide every step of our work and are infused into each pair of shoes we create. Sei – Precision and Excellence We pursue perfection in every detail through rigorous processes, continuous improvement, and uncompromising quality control. Ki – Energy and Initiative With a forward-looking mindset, we foster teamwork, responsibility, and sustainable growth through vitality and proactive action. Shin – Devotion and Respect We approach shoemaking with deep dedication and reverence, crafting each pair as a work of art that embodies our values and beliefs. We believe that by practicing “Sei, Ki, Shin” in our daily production and management, our products transcend mere footwear—they become symbols of quality and spirit.
Our Services
Quality
We conduct rigorous quality control throughout every stage—from material selection to manufacturing—to exceed our customers’ expectations.
Innovation
We are deeply committed to research and development, constantly pursuing new technologies and designs.
Our products combine comfort and functionality to deliver exceptional value to our customers.
Integrity
We value trust and long-term partnerships over short-term gains. Every pair of shoes we create carries our brand’s spirit and a deep sense of responsibility.
From the Factory Floor
Message from the Factory Manager
– Hiroaki Miyozaki
September 2025
At Diamond Sports Group, we produce approximately 30 million pairs of sports shoes and sneakers annually for leading brands in Japan and around the world. Our head office is located in Taiwan, with manufacturing bases across China and Southeast Asia—including Vietnam, Indonesia, and Cambodia.
To better serve the Japanese market with high-quality footwear and faster delivery, Nichii Sportswear Co., Ltd. was established in Yokohama, Kanagawa in 2024. While our workplace feels like a close-knit family, we take pride in doing our work with precision, care, and a strong sense of discipline.
If you're passionate about sports footwear and eager to take on new challenges, we invite you to join us as part of our opening team. This is a place where you can truly pursue personal growth and fulfillment.
Clients
