Customs Tariff Schedules of Japan · statistical code · HS 8421.21
8421.21.000: For filtering or purifying water
Water filtering and purifying machinery
✓ Can be used in a customs declaration Data: Customs Tariff Schedules of Japan, in force from 8 August 2026 · checked on 24 October 2026
- 8421 Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases.
- 8421.21.000 For filtering or purifying water
What you pay
Importing into Japan
Customs duty only: import VAT, other taxes and trade defence duties of this country are not covered here, and the duty calculator works only with the EU, Türkiye, US and UK tariffs.
Same subheading in other tariffs
8421.21 For filtering or purifying water
UK Free Third-country duty 2 tariff lines 
EU 1.7% Third-country duty 1 tariff line 
Türkiye 1.7% Third-country duty 1 tariff line 
USA Free General (MFN) 1 tariff line 
Canada Free General (MFN) 1 tariff line 
Mexico Free – 5% General (MFN) 5 tariff lines · average 2% 
Brazil 20% General (MFN) 1 tariff line 
Argentina 12.6% General (MFN) 2 tariff lines 
Peru Free General (MFN) 2 tariff lines 
New Zealand Free General (MFN) 1 tariff line 
Taiwan 3.4% – 4% General (MFN) 2 tariff lines · average 3.7% 
GCC 5% General (MFN) 4 tariff lines 
Switzerland Free General (MFN) 1 tariff line 
Norway Free General (MFN) 1 tariff line 
North Macedonia Free General (MFN) 1 tariff line 
Nigeria 5% General (MFN) 2 tariff lines Binding rulings for similar goods
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
- N361715 U.S. CBP
The tariff classification of a robot pool cleaner from Vietnam
- N360559 U.S. CBP
The tariff classification and country of origin of the Lex Aqua closed-loop water treatment system
- N359248 U.S. CBP
The tariff classification of a robotic pool skimmer from China
- N359001 U.S. CBP
The tariff classification, country of origin, and eligibility of the United States-Mexico-Canada Agreement of an Electrochemical Water Purification System
- 600014420 HMRC
Salt system cartridge. Made from 2 metal plates with plastic handles, the function is to purify water in hot tubs. Fitted into a custom-made chamber on the hot tub rim, the metal plates are suspended in the water and react with salt to create naturally produced chlorine, to purify the water. The…
57 rulings in total for this code
Legal notes
Statistical code 8421.21.000 is a line of the Customs Tariff Schedules of Japan under HS subheading 8421.21 (for filtering or purifying water).
The applied rate is free, and quantities are declared in NO, KG.
For the same subheading, the UK duty is free, the EU duty is 1.7%, the Türkiye duty is 1.7%, the US duty is free, the Canada duty is free, the Mexico duty is 0%–5%, the Brazil duty is 20%, the Argentina duty is 12.6%, the Peru duty is free, the New Zealand duty is free, the Taiwan duty is 3.4%–4%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is free and the Nigeria duty is 5%.
Japan imported goods of subheading 8421.21 worth US$198m in 2024; the largest supplier was South Korea, and the United Kingdom ranked 8th with US$3m.
Questions and answers
What is the Japan import duty for statistical code 8421.21.000?
The applied rate in the Customs Tariff Schedules of Japan is free; the supplementary unit is NO, KG. This page shows the rate as published by the national source and, where the source publishes them, preferential rates: choose the country of origin to see them. Trade defence duties and VAT are not covered.
Where does Japan import these goods from?
For subheading 8421.21 as a whole, the largest supplier in 2024 was South Korea (US$77m), followed by China.
Typical products
- electro magnetic water purifiers
- filter presses, for liquids
- hot tub water purifier
- water filters
- water purifying machinery and apparatus
- water purifying systems
Everyday names, not part of the legal text.