Bridges are a particular strength.
The firm also sells buildings and land. Aoki Marine is a construction company with landfill projects as its core strength. Marine transport, consulting, industrial waste disposal and real estate are other important business activities. Daito Trust is a general contractor whose contracts are mainly derived from proposals designed to utilize land effectively. Daito Trust creates a plan for a landowner to generate a good return, and then handles everything from construction through leasing of the completed structure.