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The JPP Mizushima plant is situated within the larger Mizushima petrochemical complex in Okayama prefecture.​

Mizushima represents one of JPP's three remaining active polypropylene production facilities, alongside Kashima and Goi. The plant is part of JPP's total remaining capacity of approximately 765,000 t/yr of polypropylene production. The Mizushima complex hosts both Japan Polypropylene and Japan Polyethylene operations.

While specific capacity details for JPP's polypropylene operations at Mizushima are not publicly disclosed in recent sources, the facility is part of Japan Polychem Corporation's broader manufacturing network in the region. The plant focuses on high-performance and functional polypropylene products as part of JPP's strategy to enhance competitiveness in specialty grades, particularly for automotive and industrial applications.