| 2509.00 | 000 | Chalk |
| 25.10 | | Natural calcium phosphates, natural aluminium calcium phosphates and phosphatic chalk |
| 25.11 | | Natural barium sulphate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 28.16 |
| 2511.10 | 000 | Natural barium sulphate (barytes) |
| 2511.20 | 000 | Natural barium carbonate (witherite) |
| 2512.00 | 000 | Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less |
| 25.13 | | Pumice stone; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated: |
| 2513.20 | 000 | Emery, natural corundum, natural garnet and other natural abrasives |
| 25.15 | | Marble, travertine, ecaussine and other calcareous monumental or building stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape |
| 2515.20 | 000 | Ecaussine and other calcareous monumental or building stone; alabaster |
| 25.16 | | Granite, porphyry, basalt, sandstone and other monumental or building stone, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape |
| 2516.90 | 000 | Other monumental or building stone |
| 2605.00 | 000 | Cobalt ores and concentrates |
| 2606.00 | 000 | Aluminium ores and concentrates |
| 25.17 | | Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling or for railway or other ballast, shingle and flint, whether or not heat-treated; macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in the first part of the heading; tarred macadam; granules, chippings and powder, of stones of heading 25.15 or 25.16, whether or not heat-treated |
| 2517.10 | 000 | Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling or for railway or other ballast, shingle and flint, whether or not heat-treated |
| 2517.20 | 000 | Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10 |
| 25.18 | | Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; dolomite ramming mix |
| 2518.10 | 000 | Dolomite, not calcined or sintered |
| 2518.20 | 000 | Calcined or sintered dolomite |
| 25.19 | | Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure |
| 2519.10 | 000 | Natural magnesium carbonate (magnesite) |
| 2519.90 | 010 | - Magnesium oxide other than calcined natural magnesium carbonate |
Harmonized Tariff Schedule of Japans inquiry: /etc/passwd
