Japan supplies 38.0% of U.S. imports of Parts for Aircraft Spark-Ignition, across 44 countries (year to date through September 2026).
HHI 1,867 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
44 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Japan | $1.4M | 18.6% | +84.1% | 0.2% |
| 2 | Italy | $1.3M | 17.5% | +10.1% | 0.7% |
| 3 | Canada | $1.2M | 16.8% | +24.3% | 0.5% |
| 4 | United Kingdom | $982K | 13.4% | +16.2% | 4.7% |
| 5 | Tunisia | $820K | 11.2% | -7.9% | 0.0% |
| 6 | Austria | $290K | 4.0% | -19.4% | 2.1% |
| 7 | Mexico | $253K | 3.5% | +56.8% | 0.0% |
| 8 | Taiwan | $175K | 2.4% | -82.4% | 10.0% |
| 9 | Germany | $168K | 2.3% | +50.1% | 5.4% |
| 10 | Czech Republic | $156K | 2.1% | -5.8% | 1.7% |
| 11 | Australia | $152K | 2.1% | +84.4% | 12.5% |
| 12 | India | $114K | 1.6% | -68.4% | 1.9% |
| 13 | France | $78K | 1.1% | -62.0% | 3.2% |
| 14 | Poland | $72K | 1.0% | -28.4% | 9.5% |
| 15 | Thailand | $66K | 0.9% | +120.8% | 0.0% |
| 16 | Singapore | $27K | 0.4% | +2.0% | 5.2% |
| 17 | Ireland | $27K | 0.4% | +803.4% | 10.0% |
| 18 | China | $25K | 0.3% | +38.7% | 37.5% |
| 19 | Switzerland | $19K | 0.3% | -24.8% | 12.5% |
| 20 | New Zealand | $10K | 0.1% | -- | 12.5% |
| 21 | Spain | $7K | 0.1% | +127.0% | 0.0% |
| 22 | Brazil | $5K | 0.1% | +89.6% | 37.5% |
| 23 | Denmark | $5K | 0.1% | +239.4% | 10.0% |
| 24 | Dominican Republic | $3K | <0.1% | -- | 12.5% |
| 25 | Turkey | $3K | <0.1% | -43.3% | 0.0% |
| 26 | Norway | hidden | hidden | hidden | hidden |
| 27 | Sweden | hidden | hidden | hidden | hidden |
| 28 | Malaysia | hidden | hidden | hidden | hidden |
| 29 | Argentina | hidden | hidden | hidden | hidden |
| 30 | Indonesia | hidden | hidden | hidden | hidden |
| 31 | South Korea | hidden | hidden | hidden | hidden |
| 32 | Colombia | hidden | hidden | hidden | hidden |
| 33 | Panama | hidden | hidden | hidden | hidden |
| 34 | Kenya | hidden | hidden | hidden | hidden |
| 35 | Belgium | hidden | hidden | hidden | hidden |
| 36 | South Africa | hidden | hidden | hidden | hidden |
| 37 | Netherlands | hidden | hidden | hidden | hidden |
| 38 | Hungary | hidden | hidden | hidden | hidden |
| 39 | Estonia | hidden | hidden | hidden | hidden |
| 40 | Georgia | hidden | hidden | hidden | hidden |
| 41 | Portugal | hidden | hidden | hidden | hidden |
| 42 | Slovenia | hidden | hidden | hidden | hidden |
| 43 | Greece | hidden | hidden | hidden | hidden |
| 44 | Israel | hidden | hidden | hidden | hidden |
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.