Rwanda Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to Japan was US$372.59 Thousand during 2016, according to the United Nations COMTRADE database on international trade. Rwanda Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to Japan - data, historical chart and statistics - was last updated on May of 2024.