Japan HS Code

HS Code 390311: Polystyrene : Expansible in Japan

Q: Is HS code 390311 the same across all countries?

Yes — up to the 6-digit level, HS code 390311 is the same in every WCO member country. Beyond 6 digits, each country extends the code for national tariff and statistical use. Japan extends it under Japan HS / Statistical Code.

Q: What system does Japan use to classify HS code 390311?

Japan classifies products under the Customs Tariff Schedules of Japan (Japan HS / Statistical Code; locally 実行関税率表), which extends HS codes to 9 digits. The first 6 digits align with the WCO Harmonized System, and the rest cover national tariff and statistical needs.

Q: Where can I officially look up HS code 390311 in Japan?

The official source is https://www.customs.go.jp/english/. For faster cross-country lookups, TradeInt's HS Code Tool consolidates classifications across all major countries in one place.

What is HS Code 390311 in Japan

Under Japan's Customs Tariff Schedules of Japan (実行関税率表), HS Code 390311 is the WCO Harmonized System subheading for Polystyrene : Expansible. This is the most detailed internationally standardized level; Japan extends classifications to 9 digits under its national tariff system. 390311 belongs to Section VII: Plastics and articles thereof; rubber and articles thereof, Chapter 39: Plastics and articles thereof, Heading 3903: Polymers of styrene, in primary forms.

Explore more 2026 Latest Japan import export trade data and shipment records for HS Code Expandable Polystyrene (EPS) on TradeInt global trade data platform

Classification Path of HS Code 390311 in Japan

Section VII

Chapters (39-40) Plastics and articles thereof; rubber and articles thereof

Chapter 39

Plastics and articles thereof

HS Code 3903

Polymers of styrene, in primary forms

HS Code 390311

Polystyrene : Expansible

HS Code 390311010

Polymers of styrene, in primary forms. > Expansible > - In blocks of irregular shape, lumps, powders (including moulding powders), granules, flakes and similar bulk forms

HS Code 390311090

Polymers of styrene, in primary forms. > Expansible > - Other

HS Code 390311100

Polymers of styrene, in primary forms > -- Expansible > --- Blocks of irregular shape, lumps, powders (including moulding powders), granules, flakes and similar bulk forms スチレンの重合体（一次製品に限る。） > －－多泡性のもの > －－－塊（不規則な形のものに限る。）、粉（モールディングパウダーを含む。）、粒、フレークその他これらに類する形状のもの

HS Code 390311900

Polymers of styrene, in primary forms > -- Expansible > --- Other スチレンの重合体（一次製品に限る。） > －－多泡性のもの > －－－その他のもの

Japan Tariff Classification: Customs Tariff Schedules of Japan (Japan HS / Statistical Code)

In Japan, HS 390311 is classified under the Customs Tariff Schedules of Japan (実行関税率表) — a 9-digit national extension of the WCO 6-digit Harmonized System.

Tariff schedule Customs Tariff Schedules of Japan (Japan HS / Statistical Code)

Local name 実行関税率表

Digits 9

Official source https://www.customs.go.jp/english/

You know what 390311 means. Now see 2026 latest real trade activity for Expandable Polystyrene (EPS) in Japan.

Buyers, suppliers, origin and destination countries, shipment dates, and quantities direct from customs records.

Search 2026 Latest Japan Import Data Search 2026 Latest Japan Export Data

Top Trading Product of HS Code 3903

Top Japan import Product Under HS Code 3903

1 390390: Other $138.0M 2 390330: Acrylonitrilebutadienestyrene (ABS) copolymers $70.6M 3 390319: Polystyrene : Other $41.8M

Figures shown for 2025.

For more 2026 recent data, search for Japan import trade records

Top Japan export Product Under HS Code 3903

1 390390: Other $261.3M 2 390330: Acrylonitrilebutadienestyrene (ABS) copolymers $112.7M 3 390319: Polystyrene : Other $94.3M

Figures shown for 2025.

For more 2026 recent data, search for Japan export trade records

Related HS Code to Japan Expandable Polystyrene (EPS) (390311)

HS Code 390311010

Polymers of styrene, in primary forms. > Expansible > - In blocks of irregular shape, lumps, powders (including moulding powders), granules, flakes and similar bulk forms

HS Code 390311090

Polymers of styrene, in primary forms. > Expansible > - Other

HS Code 390311100

Polymers of styrene, in primary forms > -- Expansible > --- Blocks of irregular shape, lumps, powders (including moulding powders), granules, flakes and similar bulk forms

HS Code 390311900

Polymers of styrene, in primary forms > -- Expansible > --- Other

HS Code 390319

Polystyrene : Other

HS Code 390320

Styreneacrylonitrile (SAN) copolymers

HS Code 390330

Acrylonitrilebutadienestyrene (ABS) copolymers

HS Code 390390

Other

HS Code 390110

Polyethylene having a specific gravity of less than 0,94

HS Code 390120

Polyethylene having a specific gravity of 0,94 or more

Frequently Asked Questions

What is HS code 390311 in Japan?

HS code 390311 covers Polystyrene : Expansible in Japan. It sits in Chapter 39 (Plastics and articles thereof), Heading 3903 of the Harmonized System, and is classified under Japan HS / Statistical Code.

Is HS code 390311 the same across all countries?

What system does Japan use to classify HS code 390311?

Where can I officially look up HS code 390311 in Japan?