Zambia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Japan was US$90 during 2004, according to the United Nations COMTRADE database on international trade. Zambia Exports of pebbles, gravel, flint, macadam of slag, tarred macadam to Japan - data, historical chart and statistics - was last updated on May of 2024.