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 FY2019 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 FY2015 FY2016 FY2017 FY2018 FY2019
Steel for electric furnace
(reinforcing steel)
1,000t 211 194 203 228 198
Blast furnace cement and
freshly-mixed concrete
1,000m3 207 255 176 225 210
Recycled tiles 1,000m2 440 310 302 356 329
Recycled plasterboards 1,000m2 6,143 4,054 4,566 4,765 4,793
Particle boards
(double flooring)
1,000m2 147 209 96 189 247
Styrene materials
(wall-backing packing)
m3 375 325 395 419 366
Water-saving toilet bowl 1,000units 16 18 16 20 15
Rooftop and wall greening 1,000m2 4 9 11 11 9
Permeable paving 1,000m2 20 21 16 26 23
SUS piping (water supply piping in communal areas) t 105 98 84 53 29
Hf inverter lighting equipment 1,000units 18 24 39 50 128
Long vinyl sheets 1,000m2 196 297 280 383 369
Extruded polystyrene foam 1,000m3 4 4 4 4
CFC-free urethane foam 1,000m2 389 720

* Data for extruded polystyrene foam since FY2016 and CFC-free urethane foam since FY 2018.

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 2019, adoption of blast furnace slag cement type B was 210,240 m3, resulting in the reduction of CO2 emissions by approx. 23,550t.

Concrete piling installation

Particle boards

Wood waste generated at construction sites is carried into a recycling facility and recycled into particle boards. The recycled particle boards are used at worksites once again, thus realizing cyclical material recycling. Compared to the process of manufacturing particle boards from raw wood, it not only leads to lower CO2 emissions but also helps protect forests, reducing the environmental burden.

In fiscal 2019, particle boards delivered totaled 3,520t, resulting in the reduction of CO2 emissions by 2,330t.