JDM Drift Parts Arrived Damaged or Lost: Who Files the Claim? (2026)

If a part you bought in Japan turns up smashed, or turns up as the wrong part, or never turns up at all, the person entitled to claim the money back is the sender in Japan, not you. Japan Post’s FAQ on damaged deliveries states that for registered, insured, parcel and EMS items the claimant changed with a Universal Postal Union convention revision: recipient for anything delivered up to 31 December 2013, sender from 1 January 2014 onwards. Your part in it is narrower and has a clock on it, which is to keep the parcel exactly as it was delivered, keep the outer box as well as the contents, and report the damage to your own local post office. Every figure and rule below was checked on the official pages on 15 September 2026.

It is the unglamorous half of importing. Everyone will tell you which proxy to use and what a bumper costs to post, and almost nobody tells you that the recourse system was built around a Japanese sender standing at a Japanese counter with a paper form.

Who is allowed to file the claim, and where does it get filed?

Japan Post’s answer is one sentence long: 「郵便物の損害賠償の請求は、郵便物の差出人が行うことができます」, indemnity for a postal item is claimed by the sender. Before any payout there has to be an investigation request, the 調査請求 (chousa seikyuu), and the download page for the form says where it goes. Items sent abroad are investigated on request from the post office they were posted at, with the form, photo ID, and the EMS or parcel receipt plus the sender’s copy. Telephone requests cannot be accepted.

There is an online version now, and it is worth reading for who it excludes. Japan Post’s 調査請求Web受付 is in trial, accepts only items posted in Kanagawa and Yamanashi prefectures, and requires 「本邦に所在する差出人ご本人さまからの請求」, a request from the sender in person, located in Japan. Requests from an agent and requests from abroad are stated to be outside the service.

How much does the post office actually pay?

Actual loss, up to a ceiling, and the ceiling is usually set by a box nobody ticked. Japan Post pays 実損額 (jisson-gaku, the real loss) but never more than the figure below.

Read the EMS row again with a parts invoice in your hand. A set of coilovers at ¥140,000 posted with no declared value is insured for ¥20,000, and raising that ceiling to ¥140,000 would have cost ¥300 at the counter. The whole decision happens in Japan, at posting, in a language you are not standing in.

Couriers are not more generous, only differently shaped. DHL’s terms limit liability by air to the lower of current market or declared value and 26 Special Drawing Rights per kilogram, roughly US$35 per kilogram, and to 8.33 SDR per kilogram, roughly US$11, for cross-border road legs. Yamato’s FAQ puts International TA-Q-BIN at ¥200,000 per piece, falling back to 26 SDR per kilogram where no item value was written on the waybill. Weight-based cover is brutal on drift parts, because the things worth the most tend to weigh the least. Our comparison of EMS, courier and sea routes covers which carriers your box can legally use in the first place.

Can I return a used part to a Japanese seller?

As a rule, no, and the proxies say so in their own words rather than hiding it. Buyee’s Cart return policy states that because it purchases on the customer’s behalf after the order request, orders cannot as a general rule be cancelled once requested, that “returns, exchanges, or cancellations due to reasons related to the purchaser’s discretion are not accepted”, and that “Buyee does not provide warranties for items sold in shops”. Its plan pages add that it does not exchange products, will not replace a damaged item or prepare the same item again after a total loss, and as a general rule will not instruct you to return the product.

What exists instead is a refund, and only if you bought a paid plan before the item shipped:

The exclusions matter more than the inclusions for our kind of shopping. Buyee states it does not check whether machines work, so a malfunctioning electronic part is covered by no plan; it does not verify authenticity of branded goods; and defects already visible in the listing photos are excluded. A second-hand ECU, a boost controller or a used gauge cluster is bought as-is on every plan. Our guide to the proxies and exporters goes through who suits which part.

Why does marketplace buyer protection stop before the part reaches you?

Because it is measured against a delivery inside Japan. Yahoo!かんたん決済 holds the winning bid with Yahoo! JAPAN until the buyer confirms receipt, and Yahoo’s page states the refund application can be made only between 8 and 12 days after the payment completes, with money going to the seller 14 days after payment unless extended to noon on day 29. The 商品満足サポート goodwill scheme pays the winning amount in PayPay points, once a year, capped at ¥10,000, subject to screening.

Every one of those clocks starts when the seller posts to a Japanese address. Mercari’s official 海外取引サポート page makes the structure explicit, describing overseas residents as customers who cannot use Mercari and stating the seller’s delivery address is a designated address inside Japan, with export and customs handled by the cross-border operator. Your part is usually still sitting in a proxy’s warehouse in Japan when the 12-day refund window shuts. The money side before all this is in our guide to paying a Japanese seller from overseas, and if you are coming over for a round of the 2026 season there are parts you can simply collect.

So the trap is not a rule about foreigners. It is geographic. The claim has to be opened by the sender, at the Japanese post office the box left from, on a paper form, in Japanese, inside a deadline, while somebody keeps the original packing at a Japanese address for the weeks it takes an answer to come back from your country.