Foreign manufacturers that have sold capital equipment, machinery, or consumer products into Japan face a recurring compliance problem: the after-sales supply chain. Spare parts, replacement components, and repair kits must move back into Japan on a regular basis to support warranty obligations, preventive maintenance contracts, and paid service agreements. The commercial arrangements that work for the original equipment sale almost never produce a clean import structure for the parts that follow. Understanding why, and how to fix it, is the focus of this guide.
The Core Problem: Who Is the Importer of Record for Spare Parts?
When a foreign manufacturer ships replacement parts to Japan, someone must appear on the import declaration (輸入申告) as the importer of record. In practice, this role typically falls by default to whichever Japan-side party is physically receiving the parts: the local distributor, the service center, or the end customer. This default arrangement has always carried legal risk, but a regulatory reform that took effect in October 2023 has sharpened that risk considerably.
Japan Customs now applies an express requirement that the party named on the import declaration hold genuine disposition rights (処分権限) over the goods at the time of declaration. Disposition rights means actual legal authority to deal with the goods: to own them, sell them, or consume them as one's own. A service technician receiving warranty parts on behalf of the overseas manufacturer does not hold those rights. Neither does a distributor that is acting as a logistics conduit for parts the manufacturer controls and tracks by serial number. The manufacturer retains title and commercial control throughout; the service agent is acting under instruction.
Naming the service center as importer on a warranty-parts shipment, in the post-October 2023 environment, is likely a false customs declaration. The consequences of a false declaration under the Customs Act (関税法) include post-clearance audit findings, demand for additional duties, and in serious cases criminal exposure for the declarant. The fact that the arrangement was industry-standard before the reform does not insulate it from scrutiny today.
Why Spare Parts Flows Are Particularly Exposed
Two features of spare-parts shipments make them unusually susceptible to this problem.
First, the commercial relationship is inherently split. The overseas manufacturer owns the parts inventory, controls which parts are dispatched, and retains title until the parts are consumed or transferred under a service agreement. The Japan-side recipient is executing the manufacturer's instructions, not buying goods in its own right. This split is structurally incompatible with the named-importer-holds-disposition-rights standard.
Second, spare-parts shipments tend to be handled informally. Original equipment imports are usually documented carefully: purchase agreements, commercial invoices, and customs entries all align. Spare parts sent as part of a maintenance contract or warranty obligation are frequently shipped on low-value or zero-value invoices, without the same documentary attention. The result is a customs record that does not accurately reflect who owns the goods or what they are worth.
Service centers that have been named as importers on warranty parts for years are, in many cases, carrying undisclosed post-clearance audit exposure that the October 2023 reform brought into focus.
Two Compliant Structures for Spare Parts Imports
There are two standard structures that produce a legally compliant import declaration for spare parts. They suit different operational profiles, and they are not interchangeable. Each is described separately below.
Structure A: Aplash as Importer of Record
Under this structure, Aplash purchases the spare parts from the overseas manufacturer under a back-to-back purchase agreement, files the import declaration (輸入申告) in its own name as legal importer, pays customs duties and import consumption tax (輸入消費税) at the border, and re-delivers or re-sells the parts to the service center or end customer in Japan. Aplash holds genuine title between purchase and re-delivery, which satisfies the disposition-rights requirement directly.
On re-sale to the Japan-side recipient, Aplash issues a qualified invoice (適格請求書) under Japan's Qualified Invoice System, enabling the downstream service center or customer to claim input credit against the Japan Consumption Tax (消費税) they have paid. This is commercially meaningful for any Japan-incorporated entity running a service business.
Structure A is best suited to manufacturers who want full customs compliance managed entirely off their own books, and to manufacturers whose Japan service networks lack a clean import structure of their own. The manufacturer's primary obligation is accurate commercial documentation: invoices that reflect the true transaction value, correct part numbers, and accurate goods descriptions. Aplash manages the rest.
Structure B: Manufacturer as Importer of Record via Attorney for Customs Procedures
Under this structure, the overseas manufacturer is named directly as importer on the import declaration. Because the manufacturer is a non-resident of Japan, it appoints an Attorney for Customs Procedures (税関事務管理人) resident in Japan to manage customs procedures on its behalf. This appointment is authorized under Article 95 of the Customs Act (関税法). Aplash serves in this role.
In Structure B, title never leaves the manufacturer. Parts flow from the manufacturer through customs and on to the service center without a buy-sell interposition. The manufacturer's direct ownership is reflected on the customs record, and the disposition-rights requirement is satisfied because the named importer genuinely owns and controls the goods.
Structure B requires the manufacturer to engage more actively with the customs process: it must provide accurate commercial documentation for each shipment and understand that it bears the direct regulatory obligations of a Japan importer of record, even though it has no physical Japan presence. Aplash as Attorney for Customs Procedures (税関事務管理人) handles the procedural interface with Japan Customs, but the legal importer status rests with the manufacturer.
This structure is best suited to manufacturers with higher parts volume into Japan, or where the manufacturer explicitly manages the service supply chain and wants customs records that reflect its ownership of the parts throughout.
Warranty Parts vs. Paid Service Parts: Different Commercial Treatment
The distinction between warranty parts and paid service parts matters for customs valuation, and collapsing the two categories into a single import approach creates risk on both sides.
Warranty parts are typically shipped at zero charge or at a nominal price, because the manufacturer is fulfilling an obligation to the end customer rather than making a commercial sale. Japan Customs applies the Transaction Value method under the Customs Tariff Act (関税定率法) as the primary basis for customs valuation. For goods shipped at no charge, the customs value cannot be declared as zero. Customs requires a value that reflects the manufacturer's cost or a comparable transaction value for identical or similar goods. Declaring warranty parts at zero is one of the most common customs valuation errors in after-sales import flows, and it is precisely the type of systematic undervaluation that post-clearance audit (事後調査) programs identify.
Paid service parts shipped under a maintenance contract or as a commercial sale follow normal commercial invoice practice. Standard customs valuation applies. Import consumption tax (輸入消費税) is assessed on the customs value plus duty, and the downstream Japan entity recovers it through the standard input tax credit mechanism. The compliance path for paid service parts is straightforward, provided the importer-of-record structure is correct.
A manufacturer running both warranty and paid service shipments should treat them as distinct import flows with distinct documentary requirements, not as a single undifferentiated category of "parts."
Periodic Shipments: Advance Planning and NACCS
Manufacturers with regular service parts shipments, such as monthly preventive maintenance kits or scheduled consignments to a service network, benefit from structuring these as planned import events rather than reactive one-off shipments.
Japan's customs processing infrastructure runs through NACCS (輸出入・港湾関連情報処理システム), the integrated electronic system for import and export declarations, cargo release, and port logistics coordination. Pre-planning parts shipments through NACCS, with accurate manifest data submitted in advance, reduces clearance delays and lowers the probability of customs examination. Shipments that arrive without advance documentation or with incomplete manifest data are more likely to be flagged for physical inspection, which adds time and cost to the service delivery chain.
For manufacturers on a recurring service schedule, structuring the import engagement as a standing arrangement with a consistent customs entry format, rather than assembling documentation from scratch for each shipment, produces better customs outcomes and a cleaner audit trail.
What Goes Wrong Without a Structure
The absence of a deliberate import structure for spare parts produces predictable failure modes. The most common are:
(a) The Japan service center is named as importer of record without holding title to or disposition rights over the parts. Post the October 2023 reform, this is a declaration accuracy problem that customs audit can surface, with liability attaching to the declarant.
(b) Warranty parts are invoiced at zero or at a nominal price that does not represent their actual value. The resulting customs declaration understates dutiable value, creating a post-clearance audit target whenever the customs authority compares declared values against the manufacturer's price lists or maintenance contract rates.
(c) Parts value is artificially split across multiple low-value shipments to avoid formal entry thresholds or to keep individual shipment values beneath the level that triggers customs examination. Systematic splitting of what is commercially a single consignment is a recognized customs risk indicator.
(d) The manufacturer's own serial-number tracking and service records show it retaining ownership and control of parts that were declared, for customs purposes, as sold to and imported by a Japan service center. This documentary inconsistency is difficult to explain in an audit context and undermines the credibility of the import record across all shipments in the series.
How to Choose Between Structure A and Structure B
The practical decision between the two structures turns on operational profile and how much customs-side engagement the manufacturer is prepared to maintain.
Structure A places the entire customs compliance function with Aplash. The manufacturer's only obligation is to provide accurate commercial documentation: invoices that state the real transaction value, correct part descriptions, and the information needed for Aplash to prepare a proper customs entry. For manufacturers with irregular or infrequent parts shipments into Japan, or for manufacturers whose Japan service network lacks any import infrastructure, Structure A is typically the faster and simpler path to compliance.
Structure B gives the manufacturer direct visibility into its own customs filings in Japan. Every import declaration reflects the manufacturer's name, and the manufacturer's customs record is its own. This transparency can be valuable for manufacturers with internal compliance requirements that demand a direct audit trail. However, Structure B requires the manufacturer to accept the procedural responsibilities of a Japan importer, manage the Attorney for Customs Procedures (税関事務管理人) relationship actively, and ensure that commercial documentation is consistently accurate.
For manufacturers shipping twenty or more parts consignments per year into Japan, Structure B often makes more structural sense: the manufacturer is already deeply embedded in the Japan service supply chain, and having its own customs record is consistent with that operational reality. For irregular or infrequent shipments, Structure A avoids the standing overhead of maintaining an active ACP appointment for a sporadic parts flow.
The two structures are not alternatives to be chosen casually. Each carries distinct legal and commercial implications. The right choice depends on the specific service supply chain, the volume and frequency of parts shipments, and the manufacturer's Japan regulatory posture.
Spare Parts Flows Require the Same Structural Analysis as Any Other Import
The October 2023 reform to Japan's importer-of-record standard was not directed at finished goods alone. It applies equally to every import declaration, including the spare parts, replacement components, and service kits that foreign manufacturers ship into Japan as part of their after-sales obligations. A service center named as importer on parts it does not own, or a warranty shipment declared at zero value, carries the same customs exposure as any other declaration that fails the disposition-rights standard or understates dutiable value. Structuring after-sales imports correctly requires the same analysis as any other Japan import flow: identifying who genuinely holds the goods at the point of declaration, documenting the transaction at its actual value, and ensuring the customs record reflects commercial reality.
This article is informational only and does not constitute legal, tax, or regulatory advice. Consult a qualified advisor before acting on the content. Aplash is a regulatory strategy and market entry firm. Last updated: June 2026.