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Tokyo, Japan - Jan. 26, 2026 - Penta-Ocean Construction Co., Ltd. (President Takuzo Shimizu) hereby announces that we have applied CELBIC-RA^*1 concrete developed by the BFCCU Study Group (a joint study group of thirteen companies, including Penta-Ocean Construction as managing company) to the foundation of the EXEO Fuchu Technical Center Multi-Level Parking Garage Construction Project (Client: EXEO Group Inc.) (Pic. 1, Fig. 1)

CELBIC-RA is an environmentally friendly concrete that combines “low carbon properties” and “high resource circularity” using concrete (CELBIC^*2), in which 70% of the binder is replaced with granulated blast furnace slag and recycled aggregate, a material that absorbs and fixes carbon dioxide (CO₂) throughout the manufacturing and storage processes.
CELBIC-RA uses recycled aggregate of grades M or L, and has obtained the Minister of Land, Infrastructure, Transport and Tourism certification required for application to building structures (MCON-4758 and -4759).

In this project, the team applied approximately 1,100 m³ of CELBIC-RA, effectively replacing all natural aggregates with M-grade recycled aggregates. When we calculated the environmental impact of CELBIC-RA, it indicated a significant reduction of CO₂ emissions by 205 tons (Fig. 2) and a decrease in the use of natural aggregate by approximately 2,000 tons. In addition, the percentage of by-products and recycled materials used in relation to the total mass of concrete reached an impressive 87%, demonstrating a high level of resource recycling. (Fig. 3)

Penta-Ocean Construction is committed to reducing CO₂ emissions across its entire supply chains and promoting the efficient use of resources. Going forward, we will actively promote the wider adoption and implementation of environmentally friendly CELBIC-RA and CELBIC on actual construction sites. This initiative will significantly contribute to the realization of a circular economy and the achievement of carbon neutrality by 2050.

^*1 CELBIC-RA (Consideration for Environmental Load using Blast furnace slag In Concrete-Recycled Aggregate)

^*2 CELBIC: An environmentally conscious concrete that satisfies the performance standards required for building structural concrete while reducing CO₂ emissions from concrete materials by approximately 9–63%.