Besides optical cables and networking equipment, the Japanese company also operates in the metals, energy and auto sectors.
The Organization of American States had called a meeting of foreign ministers to address the crisis in the country.
Steelmaker expects continued strong steel demand driven partly by industrial consumption in Mexico and infrastructure spending in Argentina.
The companies currently operate eight plants in Brazil through joint venture partnerships.
The deals on the table include the long-awaited agreement with Mercosur and 'updates' to accords with Mexico and Chile.
Investment demand for silver will continue to rise this year, buoyed by weak economic growth and political tensions, with industrial consumption slipping, research company says.
Brazil's steel industry association says local mills have invested billions since 2008 to modernize their operations.