Heading (4-digit)
8404Auxiliary plant for use with boilers of heading 84.02 or 84.03 (for example, economisers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapour power units:
補助機器（第84.02項又は第84.03項のボイラー用のものに限る。例えば、エコノマイザー、過熱器、すす除去器及びガス回収器）及び蒸気原動機用復水器
HS code 8404 is a Heading (4-digit) classification number. In Japan's trade statistics (published by Ministry of Finance), it represents import/export items classified as “Auxiliary plant for use with boilers of heading 84.02 or 84.03 (for example, economisers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapour power units:”. This code has 3 subcategories defined below it.
Latest trade statistics
In May 2026, Japan's imports under HS code 8404 (Auxiliary plant for use with boilers of heading 84.02 or 84.03 (for example, economisers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapour power units:) totaled ¥1B (YoY +971.4%), with a volume of 18 NO at about ¥58,735,556/NO. The top import sources are People's Republic of China (32.6%), Taiwan (21.2%), Switzerland (20.5%). Exports totaled ¥198M (YoY +51.5%), with a volume of 65,551 KG at about ¥3,020/KG. The top export destinations are Viet Nam (29.3%), Taiwan (22.5%), People's Republic of China (22.0%).
Export (May 2026)
¥198M
YoY: +51.5%
Qty: 65,551 KG
Unit price: ¥3,020/KG
Import (May 2026)
¥1B
YoY: +971.4%
Qty: 18 NO
Unit price: ¥58,735,556/NO
Top export destinations (2025)
| # | Country | Value | Share | Qty | Unit price |
|---|---|---|---|---|---|
| 1 | Viet Nam | ¥2B | 29.3% | 1,662,856 KG | ¥1,309/KG |
| 2 | Taiwan | ¥2B | 22.5% | 1,294,240 KG | ¥1,296/KG |
| 3 | People's Republic of China | ¥2B | 22.0% | 849,880 KG | ¥1,926/KG |
| 4 | Kuwait | ¥851M | 11.4% | 413,187 KG | ¥2,060/KG |
| 5 | Saudi Arabia | ¥531M | 7.1% | 32,088 KG | ¥16,543/KG |
Top import sources (2025)
| # | Country | Value | Share | Qty | Unit price |
|---|---|---|---|---|---|
| 1 | People's Republic of China | ¥1B | 32.6% | 56 NO | ¥19,770,054/NO |
| 2 | Taiwan | ¥721M | 21.2% | 1 NO | ¥720,544,000/NO |
| 3 | Switzerland | ¥697M | 20.5% | 37 NO | ¥18,826,919/NO |
| 4 | Republic of Korea | ¥543M | 16.0% | 37 NO | ¥14,684,027/NO |
| 5 | United States of America | ¥151M | 4.4% | 55 NO | ¥2,744,164/NO |
Subcategories3items
Related codes
Other codes in the same classification group
8401Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation:8402Steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers:8403Central heating boilers other than those of heading 84.02:8405Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers:8406Steam turbines and other vapour turbines:8407Spark-ignition reciprocating or rotary internal combustion piston engines:8408Compression-ignition internal combustion piston engines (diesel or semi-diesel engines):8409Parts suitable for use solely or principally with the engines of heading 84.07 or 84.08:8410Hydraulic turbines, water wheels, and regulators therefor:8411Turbo-jets, turbo-propellers and other gas turbines:8412Other engines and motors:8413Pumps for liquids, whether or not fitted with a measuring device; liquid elevators:8414Air or vacuum pumps, air or other gas compressors and fans; ventilating or recycling hoods incorporating a fan, whether or not fitted with filters; gas-tight biological safety cabinets, whether or not fitted with filters:8415Air conditioning machines, comprising a motor-driven fan and elements for changing the temperature and humidity, including those machines in which the humidity cannot be separately regulated:8416Furnace burners for liquid fuel, for pulverised solid fuel or for gas; mechanical stokers, including their mechanical grates, mechanical ash dischargers and similar appliances:8417Industrial or laboratory furnaces and ovens, including incinerators, non-electric:8418Refrigerators, freezers and other refrigerating or freezing equipment, electric or other; heat pumps other than air conditioning machines of heading 84.15:8419Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 85.14), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilising, pasteurising, steaming, drying, evaporating, vaporising, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, non-electric:8420Calendering or other rolling machines, other than for metals or glass, and cylinders therefor:8421Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases:8422Dish washing machines; machinery for cleaning or drying bottles or other containers; machinery for filling, closing, sealing or labelling bottles, cans, boxes, bags or other containers; machinery for capsuling bottles, jars, tubes and similar containers; other packing or wrapping machinery (including heat-shrink wrapping machinery); machinery for aerating beverages:8423Weighing machinery (excluding balances of a sensitivity of 5 cg or better), including weight operated counting or checking machines; weighing machine weights of all kinds:8424Mechanical appliances (whether or not hand-operated) for projecting, dispersing or spraying liquids or powders; fire extinguishers, whether or not charged; spray guns and similar appliances; steam or sand blasting machines and similar jet projecting machines:8425Pulley tackle and hoists other than skip hoists; winches and capstans; jacks:8426Ships' derricks; cranes, including cable cranes; mobile lifting frames, straddle carriers and works trucks fitted with a crane:8427Fork-lift trucks; other works trucks fitted with lifting or handling equipment:8428Other lifting, handling, loading or unloading machinery (for example, lifts, escalators, conveyors, teleferics):8429Self-propelled bulldozers, angledozers, graders, levellers, scrapers, mechanical shovels, excavators, shovel loaders, tamping machines and road rollers:8430Other moving, grading, levelling, scraping, excavating, tamping, compacting, extracting or boring machinery, for earth, minerals or ores; pile-drivers and pile-extractors; snow-ploughs and snow-blowers:8431Parts suitable for use solely or principally with the machinery of headings 84.25 to 84.30:8432Agricultural, horticultural or forestry machinery for soil preparation or cultivation; lawn or sports-ground rollers:8433Harvesting or threshing machinery, including straw or fodder balers; grass or hay mowers; machines for cleaning, sorting or grading eggs, fruit or other agricultural produce, other than machinery of heading 84.37:8434Milking machines and dairy machinery:8435Presses, crushers and similar machinery used in the manufacture of wine, cider, fruit juices or similar beverages:8436Other agricultural, horticultural, forestry, poultry-keeping or bee-keeping machinery, including germination plant fitted with mechanical or thermal equipment; poultry incubators and brooders:8437Machines for cleaning, sorting or grading seed, grain or dried leguminous vegetables; machinery used in the milling industry or for the working of cereals or dried leguminous vegetables, other than farm-type machinery:+47
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