A Japanese machine on your shop floor stops, and the failed part is a sensor, a solenoid valve or a bearing the size of your palm. The part number is on the label. A search finds it in seconds, at prices that do not agree with each other, from sellers who may never have touched the genuine article. Some listings say the part is “discontinued”. Others offer it “new, original, in stock”.
Buying a genuine Japanese part from abroad depends on three things: reading the part number correctly, knowing what happens when it is discontinued, and buying through a channel you can trace back to the maker. This guide covers all three, and then how to get many small parts out of Japan in one shipment.
💬 Have a list of Japanese part numbers to source? Send us the list and photos of the labels, and we will check each line before anyone quotes. Send the parts list.
Start from the full part number, not the description
Quote the complete part number exactly as printed on the label, including every suffix, because Japanese makers encode voltage, thread, cable length, output type and market version in the suffix, and two parts that differ only there are not interchangeable.
“A proximity sensor, 12 mm, three-wire” describes hundreds of parts. The full part number describes one. Suffixes commonly carry details that decide whether the part fits:
- coil or supply voltage, and AC or DC;
- output type, for example NPN or PNP, normally open or normally closed;
- cable length, or connector instead of cable;
- thread standard on pneumatic fittings and cylinders, since the same body may be offered with different port threads;
- a domestic-market or overseas version of the same base part.
Before you ask anyone for a price, collect the evidence the supplier needs. The table below is what we ask a customer for.
| What to send | Why it matters |
|---|---|
| Photo of the part’s own label, in focus | The full part number and suffix, and often a date or lot code |
| Photo of the part in place on the machine | Mounting, connector and orientation, if the label is worn |
| The machine’s maker, model and serial number | Lets the machine maker confirm the exact part fitted to that unit |
| Machine parts list or drawing, where you have one | The part number as the machine maker specified it, which may differ from the component maker’s number |
| Quantity, and whether this is a one-off or regular demand | Changes the right channel and whether a last-time buy is worth discussing |
One trap is specific to parts inside a machine. The machine maker may list a component under its own part number, not the component maker’s. Ordering the component maker’s base number can give you the right body with the wrong setting, length or connector. Where the machine maker is still trading, ask it to confirm the cross-reference.
When the part is discontinued: successor or last stock
A discontinued Japanese part usually has a maker-named successor, but “successor” means the maker’s recommended replacement, not an identical part, so get the maker’s comparison of dimensions, mounting, wiring and settings before you buy it.
Japanese makers announce the end of production (生産終了 or 生産中止) and usually name a successor (後継品) or replacement (代替品). Notices are often published in Japanese first, sometimes only in Japanese. That is one reason a part can look unavailable from abroad while a replacement is plainly listed in Japan.
What to check before accepting a successor:
| Point | What can change | Who confirms |
|---|---|---|
| Dimensions and mounting | Body length, bolt pattern, shaft or bore | Component maker’s comparison sheet or drawing |
| Electrical connection | Connector type, pin assignment, cable colour code | Component maker; your electrician checks against the machine drawing |
| Settings and parameters | Drives, controllers and sensors may need re-parameterising | Component maker; the machine maker for anything in the control logic |
| Performance | Response time, rating, operating range | Component maker’s data sheet |
| Approvals and markings | Whether the successor carries the marks your country requires | Component maker; your local inspector |
If no successor fits, there are three options. You can look for remaining genuine stock held by distributors in Japan. You can ask the machine maker whether it has an alternative or a retrofit kit. Or you can have the part repaired or reverse-engineered, which is a separate project. Remaining stock is a real route for recently discontinued parts. Buy it with the same channel checks as below, because “new old stock” is also where counterfeits hide.
Where a part is essential and still in production but its end is announced, consider buying enough for the expected life of the machine while the genuine part is still available.
Genuine or counterfeit: buy through a traceable channel
The reliable way to receive a genuine part is to buy through a chain you can trace back to the maker, from the maker or its authorised distributor in Japan through to your invoice. Packaging and price alone do not prove anything.
Genuine Japanese parts reach the market through the maker, its authorised distributors (often called 正規代理店 or 特約店), and trading companies that buy from those distributors. Counterfeits and relabelled parts tend to enter elsewhere, through anonymous marketplace listings and sellers with no stated source. Signs that a listing deserves a second look:
- the price is far below every other offer for the same full part number;
- the seller will not say where the part was bought;
- large quantities of a part the maker has discontinued;
- packaging with blurred print, missing lot or date codes, or labels in a different layout from the genuine part in your machine;
- no invoice, or an invoice from a company different from the seller.
Ways to check, in order of strength:
- Buy from the maker’s authorised channel in Japan. Many makers publish distributor lists on their Japanese websites. A part bought there, with the invoice trail kept, is the strongest evidence you can hold.
- Ask the maker to verify. Some makers will check a part number together with the lot or serial number, or photos, when asked through a distributor.
- Compare with a known-genuine part. Labels, moulding marks and packaging set side by side with the part already in your machine catch crude copies. They do not catch good ones.
We do not name makers or distributors here. The point is the mechanism: a chain of invoices back to the maker is what you need, from whoever you buy from.
💬 Want parts bought through a channel you can trace back to the maker? We buy in Japan in Japanese and keep the invoice trail for every line. Ask about your parts list.
Domestic version, warranty and support
A part bought in Japan for export may be the domestic-market version. That often makes no difference. Sometimes it does: the warranty may apply only in the country of sale, or the maker’s local office in your country may not support a part number it does not sell there. Ask before you buy whether an overseas version exists and which one your machine needs.
Getting the parts out of Japan
Small parts still go through a full export from Japan, so expect the same invoice, export declaration and, for some electronic or precision components, the same export-control check as a machine.
Four points catch parts orders specifically:
- Export control. Some sensors, drives, controllers and precision components sit close to Japan’s list-control boundary, and the exporter has to check them. Expect end-use questions on these lines. What the exporter will ask is covered in Japan’s catch-all export check.
- Consumption tax. A part bought in Japan carries consumption tax until it is genuinely exported. The export evidence is what lets the invoice go out tax-free. The full sequence is in how a purchase in Japan becomes a shipment.
- Dangerous goods. Controllers with backup batteries, lubricants and aerosol products can be restricted in air freight. Tell the forwarder what is in the box before you book.
- Classification by line. Bearings, valves, sensors and cutting tools fall under different tariff headings. One description for a mixed box such as “machine parts” invites questions at your border.
One shipment from many suppliers in Japan
Buying from several Japanese suppliers and shipping once works when one party collects, checks and repacks everything in Japan, and produces a single invoice and packing list that ties every box back to a part number.
A typical maintenance order mixes bearings from one distributor, pneumatics from another, a sensor bought from remaining stock and a few cutting tools. Shipped separately, each one carries its own export paperwork and freight. Consolidated, they move as one export. That only helps if the consolidation is done carefully:
| Step in Japan | What it prevents |
|---|---|
| Check each part on arrival against the full part number ordered | A wrong suffix found in Japan costs a phone call. Found at your factory, it costs another international shipment |
| Keep the maker’s original packaging and labels | Your proof of genuine origin, and the label your stores team will match |
| Photograph labels before repacking | A record if a line is questioned later |
| One packing list by part number, quantity and box number | Your receiving team can find each line, and your customs broker can classify each line |
| Supplier invoices kept per line | The traceable channel described above |
Consolidation from several countries in Asia into one shipment works on the same principle, and is set out in consolidating Asian suppliers into one shipment. Spare parts for a machine you have just bought, and what starting stock to hold, are part of installing Japanese machinery abroad. If the parts are for a used machine still being bought, see buying used Japanese machinery from abroad.
💬 Need parts from several Japanese suppliers in one shipment, each line checked and traceable? Sunsho Trade sources from Japan and consolidates in Japan before export. Contact us about sourcing from Japan.
Frequently asked questions
1. Is the base part number enough to order a Japanese industrial part?
No. Send the full part number with every suffix, plus a photo of the label. Suffixes carry voltage, output type, thread, cable length and market version. Parts that differ only in the suffix usually do not fit each other’s application.
2. What should I do when a Japanese part is listed as discontinued?
Ask for the maker’s named successor and its comparison against the old part: dimensions, mounting, wiring and settings. If no successor fits, look for remaining genuine stock through authorised distributors in Japan, or ask the machine maker about an alternative.
3. How can I tell whether a part is genuine?
Buy through a chain of invoices you can trace back to the maker or its authorised distributor. Where in doubt, ask the maker to verify the part through a distributor. Packaging and price are clues, not proof.
4. Do small spare parts need export paperwork from Japan?
Yes. They are exported like any other goods, with an invoice and an export declaration. Some electronic and precision components also go through the exporter’s export-control check. Batteries, lubricants and aerosols may be restricted in air freight.
5. Can parts from different Japanese suppliers be shipped together?
Yes, if one party collects them in Japan, checks each line against the part number ordered, keeps the original packaging and issues one packing list by part number and box. That turns several small exports into one.
This article describes buying and export practice, not a specific legal requirement. Export-control and consumption-tax points are covered, with their sources, in the linked articles. Checked on 19 October 2026.
More industrial sourcing guides: Precision Machining in Japan for Prototypes and Small Lots · Japanese Machinery on Overseas Power: Volts, Hz and Marks · Buying Used Japanese Machinery from Abroad: The Full Route. All guides by category are on the industrial sourcing page.