Polyplastics
Plastics ManufacturingTokio, Japan501-1000 Employees
Polyplastics Group specializes in the production and marketing of high-performance engineering plastics, developing engineering resins for applications in automotive, home appliances, and related components. Founded in Japan more than 60 years ago, the company is based in Tokyo and operates as a provider of engineering polymer solutions. Its approach builds on decades of experience to help customers progress from design concepts to market-ready products while planning for long-term objectives. Polyplastics expanded its solution business from Japan into China and the ASEAN region, and today serves customers in Europe and the Americas. In 2026, Mitsui Chemicals partnered with Polyplastics to strengthen marketing of engineering plastics.