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Heading (4-digit)

3913Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms:

天然の重合体（例えば、アルギン酸）及び変性させた天然の重合体（例えば、硬化たんぱく質及び天然ゴムの化学的誘導体）（一次製品に限るものとし、他の項に該当するものを除く。）

HS code 3913 is a Heading (4-digit) classification number. In Japan's trade statistics (published by Ministry of Finance), it represents import/export items classified as “Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms:”. This code has 2 subcategories defined below it.

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Latest trade statistics

In May 2026, Japan's imports under HS code 3913 (Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms:) totaled ¥4B (YoY +3.3%), with a volume of 2,635,381 KG at about ¥1,493/KG. The top import sources are People's Republic of China (29.1%), United States of America (27.3%), France (12.7%). Exports totaled ¥869M (YoY +19.5%), with a volume of 217,472 KG at about ¥3,996/KG. The top export destinations are United States of America (28.9%), Bangladesh (7.7%), Republic of Korea (7.4%).

Export (May 2026)
¥869M
YoY: +19.5%
Qty: 217,472 KG
Unit price: ¥3,996/KG
Import (May 2026)
¥4B
YoY: +3.3%
Qty: 2,635,381 KG
Unit price: ¥1,493/KG

Top export destinations (2025)

#CountryValueShareQtyUnit price
1United States of America¥3B28.9%618,550 KG¥4,592/KG
2Bangladesh¥752M7.7%221,856 KG¥3,390/KG
3Republic of Korea¥730M7.4%81,901 KG¥8,915/KG
4Mexico¥677M6.9%268,180 KG¥2,526/KG
5Taiwan¥641M6.5%364,665 KG¥1,758/KG

Top import sources (2025)

#CountryValueShareQtyUnit price
1People's Republic of China¥12B29.1%4,024,943 KG¥2,939/KG
2United States of America¥11B27.3%8,751,616 KG¥1,265/KG
3France¥5B12.7%6,777,444 KG¥763/KG
4Republic of Korea¥2B6.1%5,680,113 KG¥435/KG
5Denmark¥2B5.7%141,420 KG¥16,315/KG

Subcategories2items

Subheading (6-digit)
391310Alginic acid, its salts and esters
Subheading (6-digit)
391390Other Ⓘ

Related codes

Other codes in the same classification group

3901Polymers of ethylene, in primary forms:3902Polymers of propylene or of other olefins, in primary forms:3903Polymers of styrene, in primary forms:3904Polymers of vinyl chloride or of other halogenated olefins, in primary forms:3905Polymers of vinyl acetate or of other vinyl esters, in primary forms; other vinyl polymers in primary forms:3906Acrylic polymers in primary forms:3907Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms:3908Polyamides in primary forms:3909Amino-resins, phenolic resins and polyurethanes, in primary forms:3911Petroleum resins, coumarone-indene resins, polyterpenes, polysulphides, polysulphones and other products specified in Note 3 to this Chapter, not elsewhere specified or included, in primary forms:3912Cellulose and its chemical derivatives, not elsewhere specified or included, in primary forms:3915Waste, parings and scrap, of plastics:3916Monofilament of which any cross-sectional dimension exceeds 1 mm, rods, sticks and profile shapes, whether or not surface-worked but not otherwise worked, of plastics:3917Tubes, pipes and hoses, and fittings therefor (for example, joints, elbows, flanges), of plastics:3918Floor coverings of plastics, whether or not self-adhesive, in rolls or in the form of tiles; wall or ceiling coverings of plastics, as defined in Note 9 to this Chapter:3919Self-adhesive plates, sheets, film, foil, tape, strip and other flat shapes, of plastics, whether or not in rolls:3920Other plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials:3921Other plates, sheets, film, foil and strip, of plastics:3922Baths, shower-baths, sinks, wash-basins, bidets, lavatory pans, seats and covers, flushing cisterns and similar sanitary ware, of plastics:3923Articles for the conveyance or packing of goods, of plastics; stoppers, lids, caps and other closures, of plastics:3924Tableware, kitchenware, other household articles and hygienic or toilet articles, of plastics:3925Builders' ware of plastics, not elsewhere specified or included:3926Other articles of plastics and articles of other materials of headings 39.01 to 39.14:

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