Japan supplies 53.6% of U.S. imports of Isoprene Rubber (IR) — Primary Forms, across 14 countries (year to date through August 2026).
HHI 3,470 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
14 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Japan | $533K | 54.0% | -22.7% | 6.0% |
| 2 | Russia | $149K | 15.1% | -20.8% | 32.5% |
| 3 | India | $130K | 13.2% | -47.6% | 10.0% |
| 4 | Singapore | $87K | 8.8% | +259.4% | 12.5% |
| 5 | China | $49K | 4.9% | -5.5% | 37.5% |
| 6 | United Kingdom | $37K | 3.8% | +1.8% | 10.0% |
| 7 | Canada | $2K | 0.2% | +16.6% | 0.0% |
| 8 | Malaysia | -- | 0.0% | -- | -- |
| 9 | Taiwan | -- | 0.0% | -66.8% | -- |
| 10 | France | -- | 0.0% | -- | -- |
| 11 | Brazil | -- | 0.0% | -21.6% | -- |
| 12 | Germany | -- | 0.0% | -- | -- |
| 13 | Austria | -- | 0.0% | -73.7% | -- |
| 14 | Sri Lanka | -- | 0.0% | +10.4% | -- |
Duty is the duty Census calculated on this month's imports for consumption from each country, as a share of their customs value. It applies the rates in force, additional duties such as Section 301, 232 and IEEPA included and claimed trade-agreement preferences netted out, so it is an observed rate rather than a statutory one. It is an estimate, not duty collected: antidumping and countervailing duties, fees and later refunds are not in it. YoY compares year-to-date value with the same months last year.