“GMP” gets used loosely in supplement sourcing conversations, and Japan’s own GMP landscape has more layers than a one-line claim suggests: a long-standing voluntary guideline, industry-run third-party certification on top of it, and — new from 1 September 2026 — a legal obligation for one specific category of product.
This guide sets out what each layer actually is, how they relate to each other, and what documents a buyer can reasonably ask a Japanese factory to produce.
💬 Sourcing from a GMP-certified line in Japan and want the paperwork explained before you commit? See Japan-made supplement OEM.
What “GMP” means for a Japan-made tablet or capsule
GMP (Good Manufacturing Practice) is a system of manufacturing and quality management covering every step from raw-material receipt to finished-product shipment, and Japan has run a guideline for it since 2005.
Japan’s Ministry of Health, Labour and Welfare first published a GMP guideline for “tablet, capsule-shaped foods” (錠剤、カプセル状食品等) on 1 February 2005, alongside a related guideline on self-checking raw-material safety. The guideline sets out the organised management of two linked activities across the whole production run:
| Activity | What it covers |
|---|---|
| Manufacturing control (製造管理) | Control of the work of staff and machinery carrying out production |
| Quality control (品質管理) | Testing and verification of raw materials, intermediate goods and finished products |
The rationale, as MHLW put it when introducing the guideline, is that concentrating a food into a tablet or capsule can introduce a bias in a batch’s actual content, so a product’s confirmed safety or expected efficacy is not automatically guaranteed without process control behind it.
Third-party GMP certification
Because the original guideline was voluntary, Japan built a separate, industry-led system of third-party GMP certification on top of it, rather than government inspection of every factory.
Following a 2008 government study group’s recommendation, Japan set up a framework in which a manufacturer’s own safety self-check is reviewed and certified by an independent, industry-run certification body rather than by a government inspector. A handful of such bodies operate in Japan; each certifies a specific factory against the GMP guideline’s requirements, typically covering the physical facility, documented procedures, staff training records and traceability.
| Feature | Voluntary GMP guideline | Third-party GMP certification |
|---|---|---|
| Legal status (before 1 September 2026) | Recommended, not mandatory | Entirely voluntary on top of the guideline |
| Who assesses compliance | The manufacturer itself | An independent, industry-run certification body |
| What it produces | Internal conformance | A certificate naming the specific factory and scope, renewed periodically |
| What it does not cover | — | Certification is factory- and scope-specific; it does not automatically extend to every product or line at a company |
A GMP certificate is tied to a named manufacturing site and a defined scope, not to a company as a whole — a detail worth checking when a supplier states it is “GMP certified” without naming the certified factory.
💬 Want to confirm whether a specific manufacturing step is covered by GMP certification before you specify it? Tell us the process.
The 1 September 2026 mandatory GMP rule
From 1 September 2026, GMP became a legal manufacturing requirement — but only for Foods with Function Claims sold in “supplement shape”: tablet, capsule, powder and liquid form.
Japan’s Consumer Affairs Agency revised the GMP guideline and, after a two-year transition period that ended 31 August 2026, made it a compliance obligation under the Food Labelling Standards for a notified Foods with Function Claims (FFC) product in tablet, capsule, powder or liquid form. The factories subject to management are those that make the tablets or capsules themselves and the primary-packaging site; a secondary-packaging site that never touches the tablet or capsule directly falls outside the mandate. A manufacturer in scope is now subject to on-site inspection by the CAA, in addition to the self-check the guideline has long required.
Whether gummy, jelly and other confectionery-style FFC products fall within the mandate is not spelled out. The obligation attaches to products notified as tablets, capsules and similar forms, and a CAA document of April 2026 noted that it is unclear whether gummy shapes are covered, while proposing, for a new supplement regulation still under discussion, to leave such forms out of mandatory GMP at first. This mandate does not extend to products outside the FFC system — an ordinary food, or a Food with Nutrient Function Claims, is not covered by this specific requirement. See our Foods with Function Claims guide for how FFC notification itself works, and our dosage forms guide for how this GMP change treats different product shapes.
| Product category | GMP legally required from 1 September 2026? |
|---|---|
| FFC product, tablet or capsule | Yes |
| FFC product, powder or liquid | Yes |
| FFC product, gummy or jelly | Not clearly defined; a proposal under discussion would leave it out at first |
| Ordinary food (no FFC notification), any shape | Not covered by this rule |
What documents a buyer can ask for
A buyer sourcing from Japan can reasonably ask for a copy of a factory’s GMP certificate naming that specific site and scope, and — separately — a certificate of analysis for the specific batch supplied.
- GMP certificate. If the factory holds third-party GMP certification, ask for a copy showing the certified site’s name and address, the certification body, the scope of certification and the certificate’s validity period.
- FFC notification status, if relevant. If the product is or will be notified as a Food with Function Claims, ask whether the manufacturing site is the one on file with the notification, since the GMP mandate is tied to the site actually making the supplement-shaped product.
- Certificate of analysis (CoA). A batch-specific test report is a separate document from a GMP certificate; a GMP certificate says a facility is managed to a standard, a CoA says what a particular batch actually contains.
- Specification sheet. The written product specification the factory manufactures against, so you can compare it against what you ordered.
A GMP certificate answers “is this facility run to a documented standard,” not “what exactly is in this batch” — both documents matter, and neither substitutes for the other.
Before you ask for a quotation
Confirm which GMP layer matters for your product before specification.
- Whether your product will be notified as a Foods with Function Claims in Japan, and in which dosage form
- Whether that combination falls under the mandatory GMP rule from 1 September 2026
- Whether you want third-party GMP certification even where it is not legally required, and for which specific factory
- The documents you will need from the factory: GMP certificate, specification sheet, batch CoA
- Your target markets’ own manufacturing-quality expectations, alongside Japan’s rules
💬 Ready to confirm the GMP status you need for your product and market? Send us the dosage form and whether it will carry an FFC claim and we will map out what applies.
Frequently asked questions
1. Is GMP legally required for every supplement made in Japan?
No. From 1 September 2026 it is legally required for Foods with Function Claims in tablet, capsule, powder or liquid form. For gummy and jelly FFC products the rules do not give a clear answer, and products outside the FFC system entirely are not covered by this specific mandate. GMP-certified manufacturing remains available and advisable for any product.
2. What is the difference between the GMP guideline and GMP certification?
The guideline is the written standard for manufacturing and quality control that MHLW first published in 2005. Certification is a separate, voluntary process in which an independent industry body reviews a specific factory against that standard and issues a certificate for that named site and scope.
3. Does a company-wide claim of “GMP certified” mean every product it makes is covered?
Not necessarily. A GMP certificate names a specific manufacturing site and scope. Ask which factory and which processes the certificate actually covers.
4. What changed with the 1 September 2026 rule specifically?
GMP moved from a recommended guideline to a legal manufacturing-management requirement, but only for the FFC, supplement-shaped category, with the manufacturer now subject to CAA on-site inspection rather than only self-checking.
5. Does my export-only product need Japanese GMP certification if it will never be sold in Japan or carry an FFC notification?
The 1 September 2026 mandate applies to FFC products notified and sold in Japan, so an export-only product without a Japanese FFC notification is not covered by that specific legal requirement — but a GMP-certified line remains good practice and is often asked for by importers in other markets regardless.
Sources: Ministry of Health, Labour and Welfare, “「錠剤、カプセル状等食品の適正な製造に係る基本的考え方について」及び「錠剤、カプセル状等食品の原材料の安全性に関する自主点検ガイドライン」について” (食安発第０２０１００３号, 1 February 2005) (mhlw.go.jp/web/t_doc?dataId=00tb2694&dataType=1&pageNo=1); Consumer Affairs Agency, “「錠剤、カプセル剤等食品の製造管理及び品質管理(GMP)に関する指針(ガイドライン)」に係る項目解説及び自己点検表について” (caa.go.jp/notice/entry/042170/), published 2 May 2025; Consumer Affairs Agency new-food-safety council meeting materials on GMP scope and rationale (caa.go.jp/policies/council/fssc/meeting_materials/); secondary industry reporting corroborating the 1 September 2026 mandatory date and the scope limited to tablet/capsule manufacturing and primary-packaging sites (Japanese trade press); background on Japan’s industry-led third-party GMP certification framework, established following a 2008 MHLW study-group report recommending third-party certification of businesses’ own safety self-checks (search-result summaries of caa.go.jp policy council materials and industry-association GMP overview pages). Checked on 25 September 2026.