Importing Seeds & Plants into Japan: Who Handles Certificates, Quarantine and Customs?

Japan's Plant Protection Act regulates a broad range of living plants and plant products to prevent harmful pests and diseases from entering the country. The requirements depend on the scientific name, plant part, purpose, country or region of production, and country of export. A shipment that can legally enter from one origin may face extra conditions or a prohibition from another.

First classify the plant's import status

Use the Plant Protection Station import-conditions database as the starting point. Search using the correct species, plant part and origins; the database is not a substitute for checking special notices or consulting the responsible Plant Protection Station. Commercial samples and small seed packets do not become exempt merely because their quantity is low.

For plants intended to be eaten or sold as food, the Plant Protection Act and the Food Sanitation Act may both apply. See the separate Food Import to Japan Guide. For cultivation seeds, our primary focus here is plant quarantine and related seed-business requirements.

Not every item below applies to every shipment. Identify mandatory export-country certificates and tests before packing the goods. Product and lot records can be gathered early; Japan-side applications and Customs documents are prepared around the actual shipment.

Documents & Supporting Information

Certificate format: Japan generally expects the government-issued original or an officially acceptable equivalent. The PPS recognises certain certified copies and verifiable electronic documents; do not assume an ordinary unverified scan is enough. The form and authenticity rules should be checked with the representative before shipment. See the PPS import FAQ.

You do not need to independently locate every Japan-side service provider. For a shipment we accept, Gemslinks can arrange a Japanese customs broker or coordinate with the importer's existing broker. We also establish whether that broker can act as the plant inspection applicant's representative, or whether a separate representative is needed. The exact scope is confirmed before formal filing.

The normal route is export-country phytosanitary preparation → Japanese plant inspection application and examination → Customs import permission → delivery. Required growing-season tests must happen before dispatch. Domestic sale preparation can often run in parallel; post-entry quarantine cultivation, if legally required, changes the ordinary release and use plan.

Process, Responsible Party, Documents and Completion

05.1 — Exporting-country phytosanitary certification

For regulated goods, the exporter obtains the Phytosanitary Certificate (植物検疫証明書) from the exporting country's official National Plant Protection Organization (NPPO). It identifies the consignment and supports compliance with the applicable requirements. If Japan requires a prescribed additional declaration or a special measure, the official certificate must reflect that requirement.

Where mandatory field inspection, molecular diagnosis or another specified export-country measure applies, it is not enough to book a laboratory test without checking the official regulatory arrangement. The exporter should establish who can sample, which method / lot size applies, what the NPPO must confirm and whether any certificate wording is mandatory. When goods pass through a third country, check whether a valid re-export phytosanitary certificate or supporting original-origin documents are required; transit alone does not change the true production origin.

05.2 — Japanese Plant Import Inspection Application

In the standard commercial workflow, the Japanese importer or an appointed representative submits the Application for Import Inspection of Plants, Import-prohibited Articles, etc. (植物、輸入禁止品等輸入検査申請書) to the Plant Protection Station responsible for the arrival port or airport. The application can be accepted from seven days before the planned import date. PPS describes electronic routes including NACCS plant-quarantine functions (APS).

Gemslinks confirms the actual filing party. An accepted Customs broker may also represent the importer for plant inspection if the work and authorisation are agreed; it is not automatic simply because the broker will file the Customs entry. The importer may need a plant-quarantine-specific authorisation or a mandate that expressly covers it.

05.3 — What does Japan PPS check?

PPS checks whether the plants are prohibited, whether the government-issued phytosanitary document and any required declarations meet Japanese conditions, and whether the consignment matches the submitted records. Arrival inspection for pests and any necessary precision tests are discussed in 06 — Inspection & Testing.

Official procedural source: MAFF — plant import procedures for businesses and MAFF — Import FAQ (Japanese).

05.4 — Which Quarantine Pests and Plant Diseases Are Regulated in Japan?

Japan's Plant Protection Station (PPS) maintains an official quarantine pest list under the Plant Protection Act. The 18 June 2026 version of Annexed Table 1 contains 1,021 listed entries: 751 injurious animals and 270 injurious plants, microorganisms and diseases. The entries are organised into seven categories.

The table combines the official category totals with selected examples. It gives importers an overview of the types of pests that can affect tomato seeds, pepper seeds, grains, seedlings, seed potatoes and nursery plants, without implying that every organism must be tested for every shipment.

Japan's 1,021 Listed Quarantine Pests and Diseases

Source: Ministry of Agriculture, Forestry and Fisheries (MAFF), Plant Protection Station, Quarantine Pest List (Annexed Table 1), updated 18 June 2026. The counts are official; the organism and commodity examples are illustrative, not a product-specific testing schedule.

Why Do These Categories Matter for Seed and Plant Importers?

Being listed as a quarantine pest does not mean every seed or plant shipment must be tested for it. For particular combinations of plant species, plant part and country of production or export, Japan may prohibit imports or require official measures in the exporting country, including pest-specific testing or an additional declaration on the Phytosanitary Certificate.

For example, tomato seeds and pepper seeds may be affected by requirements relating to ToBRFV, PSTVd, CLVd or PCFVd. Whether one or more of these requirements applies depends on the specific botanical product and country: the four names are not a universal seed-testing checklist.

What happens if testing or an inspection is required? The exporting-country National Plant Protection Organization (NPPO) and Japan PPS determine their respective official procedures. For who arranges sampling, examination time, additional costs and cargo-release restrictions, see 06 — Inspection & Testing.

Most regulated plants receive an import inspection, but not all undergo a new molecular test at every stage. The inspection method, sampling quantity, required certificate statements and whether the consignment can proceed depend on the commodity, origin and current PPS rules. Gemslinks does not collect official samples or perform pathogen diagnosis.

Different inspection and test pathways

What happens when a detailed Japan test is required?

A practical seed example — when origin testing matters

A commercial lot of Capsicum annuum seeds for planting may require a more detailed check than an invoice and a general phytosanitary certificate. Japan's requirements for the exact production country, plant part and applicable quarantine pests determine whether the exporter needs an official molecular diagnosis or other evidence before the NPPO can certify the lot. A private laboratory's standard certificate of analysis does not, by itself, prove compliance with an officially prescribed export-country measure.

Do not treat the example as a fixed test panel for all pepper seeds. The importer and export-country partner should check current conditions for the precise origin and shipment. For some plants, failure to satisfy the required overseas measure makes import prohibited rather than merely subject to a Japanese arrival test.

For regulated plants, the appointed broker confirms the Japan PPS quarantine-pass evidence before completing Customs clearance under the applicable other-law confirmation. Japan Customs grants import permission separately. After Customs permission and release by the terminal / warehouse, Gemslinks coordinates the agreed delivery. A phytosanitary certificate from abroad alone does not permit delivery to the Japanese buyer.

Which requirements may remain after Customs permission?

Related official sources: Japan Customs — Plant Protection Act requirements · MAFF — GM-related planting-seed import checks. The applicable Seed and Seedlings Act provisions, including changes made in 2026, should be checked against their effective dates before starting a regulated seed-sales operation.

The Japan Plant Protection Station itself does not charge an ordinary plant-import inspection fee, according to its official FAQ. However, that does not make the shipment free of charges: an overseas NPPO or laboratory, the nominated representative, Customs broker, warehouse and carrier may each charge for their own work. Costs depend on the exact plant and route.

What most often changes the quotation?

Gemslinks supports international freight, broker / representative coordination, document tracking and delivery planning for accepted shipments. We can arrange a suitable Japanese Customs broker or work with the one your importer has already appointed. We establish who will handle PPS import inspection applications and where specialised export-country phytosanitary or laboratory work must be organised separately. The exporter / its NPPO remain responsible for issuing valid export-country phytosanitary documents.

What to send in your first enquiry — only what you know

Practical FAQ — Situations That Change the Route

Questions About Certificates, Testing and Shipment Methods

Official References & Current Conditions

Government Sources Used for This Guide

These are official starting points for the specific botanical species, plant part, origin and planned shipment date. Plant-quarantine restrictions can change rapidly following overseas pest findings; always check the updated conditions and consult the responsible PPS before committing regulated cargo.

Official sources checked 24 October 2026. This page provides general operational guidance, not a legal opinion, government import permit, phytosanitary certification, laboratory appointment or a guarantee of Customs clearance. The importer, NPPO, Japan PPS and appointed broker must confirm the actual case.