Protecting the precious environment
Supply chain

We promote activities to protect and improve the global environment in alliance with partner companies.

Green procurement initiatives

Initiatives to select materials with smaller environmental footprint is called green procurement. As part of our green procurement initiatives, we investigated 14 green procurement materials for FY2020 and counted their quantity.

Going forward, we will review and add green procurement materials as necessary in consideration of green procurement results, social trends and other factors.

Item Unit FY2016 FY2017 FY2018 FY2019 FY2020
Steel for electric furnace
(reinforcing steel)
1,000t 194 203 228 198 187
Blast furnace cement and
freshly-mixed concrete
1,000m3 255 176 225 210 208
Recycled tiles 1,000m2 310 302 356 329 226
Recycled plasterboards 1,000m2 4,054 4,566 4,765 4,793 4,537
Particle boards
(double flooring)
1,000m2 96 189 255 247 267
Styrene materials
(wall-backing packing)
m3 325 395 419 366 377
Water-saving toilet bowl 1,000units 18 16 20 15 15
Rooftop and wall greening 1,000m2 9 11 11 9 1
Permeable paving 1,000m2 21 16 26 23 30
SUS piping (water supply piping in communal areas) t 98 84 53 29 21
LED lighting equipment 1,000units 194
Long vinyl sheets 1,000m2 297 280 383 369 293
Extruded polystyrene foam 1,000m3 4 4 4 4 4
CFC-free urethane foam 1,000m2 389 720 890

* Data for extruded CFC-free urethane foam since FY2018, and LED lighting equipment since FY2020.

Blast furnace slag cement type B

Blast furnace slag cement type B, which is superior against cracks and in terms of chemical resistance, is mainly adopted in concrete piles. CO2 generated during cement production is the largest in volume during the manufacturing process of clinker, an interim product of cement. The production of blast furnace slag cement involves mixing large volumes of blast furnace slag fine powder into normal cement, which leads to a much lower composition ratio of clinker than in normal cement, and in turn, reduction of CO2 emissions.

In fiscal 2020, adoption of blast furnace slag cement type B was 208,117 m3, resulting in the reduction of CO2 emissions by approx. 23,300t.

Concrete piling installation

Particle boards

We send waste wooden materials generated at construction sites to recycling facilities for recycling the waste into particle boards, and then use the particle boards manufactured from recycled waste at our construction sites. We thus engage in circular material recycling. This effort leads to the mitigation of environmental impact as the manufacturing process using recycled waste can reduce CO2 emissions, as compared with the manufacturing process using fresh wood, while it also contributes to conservation of forests.

The amount of particle board procured during fiscal 2020 was 3,206 tons, resulting in the reduction of approximately 2,126 tons of CO2.