The plan envisions the use of low-carbon concrete, biofuels, and electrification of construction machinery, with a detailed assessment of associated challenges, costs, and construction feasibility. Drawing on examples from the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) and other local governments, Bureau of Port and Harbor of Tokyo will compile draft specifications and trial procedures, considering contractor-directed project execution, with a policy proposal expected in fiscal year 2026.

Tokyo pushes carbon-neutral port construction with green materials and clean energy

The Bureau is examining low-carbon concrete and stone materials, biofuel use in construction machinery, and electrification of equipment. Procurement availability and sources, considerations during design, construction, and maintenance, as well as costs, construction schedules, and expected emission reductions will be analyzed. Draft specifications will be developed based on trial designs and standard cross-sections.

Concrete options under review include three types: Blast Furnace Cement Type C, CO₂-absorbing, and CO₂-fixing varieties, applicable not only to cast-in-place concrete but also to precast products. In the case of stone materials, the utilization of steel slag will be considered. Additional construction materials, including ground improvement agents, steel, asphalt pavement, and coatings used in port works, will be cataloged in a comprehensive table.

In the field of construction machinery, the Bureau is exploring the introduction of biofuels derived from waste cooking oil, specifically FAME (fatty acid methyl ester), as well as electric machinery. Procurement quantities, costs, transportation and storage methods, legal compliance, and fuel efficiency will be reviewed, leading to the creation of trial work guidelines. Simultaneously, support measures for contractors will be considered.