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Since our founding in 1918, Yoneyama has continued supplying high-quality products in the face of numerous obstacles including world wars and energy crises. Our long-term endurance proves the dependability of our brand.
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We produce organic and inorganic products in both large and small quantities. Our wide range of products includes organic acids and non-phosphate products such as ammonia and metal salts.
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We maintain a stable supply of high-quality products by using only domestic production for major raw materials, and drawing on a network created under our business continuity plan and cultivated over many years.
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We respond precisely to client needs, using our technologies to bring them to life as developed products. Our tailor-made approach is embodied by our ‘YOUR LABO’ concept.

High-quality products complying with all applicable laws
We create safe and worry-free products that comply with all applicable laws governing items such as special grade reagents, food additives, fertilizers and toxic substances.

Efficient particle size control
We provide high-yield mesh control by varying production conditions.

Reducing solidification
We use a number of different measures to reduce product solidification in processes ranging from production to distribution.
For just over a century, Yoneyama has been responding to the needs of many different industries by developing chemical products that help enrich the lives of users. Yoneyama draws on a rigorous quality control system to work on unlocking the unlimited future potential of chemistry. Our unwavering commitment to R&D drives our ongoing development of products with unlimited potential to make life easier for users and enrich their lives.
