Valerian root is one of the best-known herbal sleep ingredients internationally, and brands abroad sometimes assume — because it is a medicine-only herb in some markets, and because so many “sleep herbs” run into Japanese regulatory trouble — that it cannot be made in Japan at all. That assumption is wrong: valerian root sits on Japan’s food-eligible list, not its medicine-only list. What is genuinely mixed is the trial evidence behind it.
This guide is for brand owners planning an oral valerian product made in Japan. It covers valerian’s confirmed Japanese food status, what the trials show, and how to formulate the product.
Health supplements are foods, not medicines, and are not a substitute for medical treatment. Nothing here is a claim that any product prevents, treats or cures a disease.
💬 Planning a valerian product made in Japan? We check the full formula against Japanese food law first. See Japan-made supplement OEM.
Valerian’s status in Japan
Valerian root and rhizome are listed on the Ministry of Health, Labour and Welfare’s illustrative list of substances not automatically judged to be medicines, which means a Japanese factory can manufacture it as a food as long as no medicinal effect is claimed.
Under Japan’s food-drug classification system (食薬区分), the Ministry of Health, Labour and Welfare’s list of substances “not judged to be medicine unless a medicinal effect is claimed” includes カノコソウ (kanokosou), the root and rhizome material covering both Japanese valerian and Western valerian (西洋カノコソウ, Valeriana officinalis). This is a food-eligibility status, separate from a Foods with Function Claims notification; this guide did not find a confirmed generic Foods with Function Claims notification specifically for valerian in Japan.
What the research shows
Systematic reviews of valerian and sleep report inconsistent results across individual trials, though a 2020 review pooling a larger set of studies found a broader benefit and suggested the inconsistency may relate to variable extract quality.
| Study | Design/What was analysed | Reported result |
|---|---|---|
| Systematic review and meta-analysis, Am J Med 2006 (PMID 17145239) | 16 randomised, placebo-controlled trials, 1,093 participants, pooling sleep-quality outcomes | A dichotomous “improved sleep or not” outcome, reported by 6 of the studies, showed a statistically significant benefit (relative risk 1.8), but with evidence of publication bias; most studies had significant methodological problems and doses/preparations varied considerably |
| Systematic review and meta-analysis, J Evid Based Integr Med 2020 (PMID 33086877) | 60 studies, 6,894 participants; meta-analyses on subjective sleep quality (10 studies, 1,065 participants) and anxiety reduction (8 studies, 535 participants) | Valerian improved subjective sleep quality and reduced anxiety; the authors attributed earlier inconsistent results partly to variable extract quality, and suggested whole root/rhizome material gives more reliable effects than isolated fractions; no severe adverse events reported |
The 2006 review is older, covers fewer studies, and found evidence of publication bias in its main summary measure. The 2020 review is larger and more recent but still describes valerian’s evidence base as historically inconsistent, and neither review reports strong support from objective sleep measures such as actigraphy or polysomnography. Both reviews describe valerian as generally well tolerated.
Checked against the published abstracts on 25 September 2026.
💬 Need an evidence summary for your regulatory adviser that separates Japan’s food-eligibility status from the trial evidence? We prepare it with the manufacturing documents. Tell us your market.
Wording that stays on safe ground
Describe valerian by what has been studied — subjective sleep quality, with inconsistent results across trials — not by sleep disorders as conditions.
| Safer wording | Wording to avoid |
|---|---|
| ”Studied for subjective sleep quality” | Names of sleep disorders such as insomnia, or “cures sleeplessness” |
| Noting that trial results have been inconsistent | ”Clinically proven” without naming the review and its limits |
| ”Contains valerian root extract” with the amount per serving | Implying every valerian product on the market has the same evidence behind it |
How valerian is formulated
Valerian is available as dried root, tea-cut material or standardised extract, and the 2020 review’s suggestion that whole root/rhizome material performs more consistently is worth factoring into a sourcing decision.
| Dosage form | Why brands choose it | What to weigh up |
|---|---|---|
| Tea or tea bag | Traditional format for valerian | Valerian’s characteristic strong odour and taste |
| Hard capsule | Masks the taste and odour, precise dosing | Fill weight needed for gram-level doses used in trials |
| Tablet | Familiar, easy to combine with other ingredients | Tablet size at higher doses |
| Drink or powder stick | Evening-routine products | Taste, odour and extract solubility |
Decisions that shape the specification:
- Whole root/rhizome vs isolated fraction. The 2020 review linked more consistent results to whole root/rhizome material rather than isolated fractions; ask the supplier what material form they supply.
- Amount per serving. Match the amount to a study you intend to cite; doses and preparations vary considerably across the trials reviewed.
- Companion ingredients. Valerian is often combined with other relaxation ingredients. Every ingredient in such a formula needs its own check against Japanese food law.
- Your market’s status for valerian. Its status differs sharply between countries — it is a food-supplement ingredient in some markets and a medicine-only herb in others. Confirm it before you commit to a formula.
The check that comes first
Every ingredient must be permitted in foods in Japan, or a Japanese factory cannot make the product.
Valerian root is food-eligible in Japan, so this check is mainly about companion herbs and your other markets’ rules rather than valerian itself. See the Japan-made supplement OEM page, and compare with our GABA, L-theanine and glycine guides for other relaxation and sleep ingredients.
Before you ask for a quotation
A factory can quote accurately once the material form, the amount, the form, the companions and the packaging are fixed.
- Valerian material form (whole root/rhizome material vs isolated fraction) and its specification
- Amount per serving and servings per pack
- Dosage form
- Companion ingredients and their amounts
- Countries you will sell in, and valerian’s status there — including any markets where it is medicine-only
- First order and annual volume
💬 Ready to design a Japan-made valerian product? Send us the concept — amount, form, companion ingredients and the countries you will sell in.
Frequently asked questions
1. Can a Japanese factory make a valerian supplement?
Yes. Valerian root and rhizome are on Japan’s list of substances not automatically judged to be medicines, so it can be manufactured as a food provided no medicinal effect is claimed on the label.
2. Does valerian actually improve sleep?
The evidence is inconsistent. A 2006 review found a significant benefit on a simple “improved or not” measure but noted publication bias and methodological problems; a larger 2020 review found benefits for subjective sleep quality and suggested that inconsistent past results may relate to variable extract quality.
3. Does Japan have a Foods with Function Claims notification for valerian?
This guide did not find a confirmed generic notification specifically for valerian. Its food-eligible status is separate from, and does not require, a Foods with Function Claims notification.
4. Is valerian’s status the same in every country?
No. Its status varies sharply by market — a food-supplement ingredient in some, a medicine-only herb requiring prescription in others. Confirm each market’s rule separately before committing to a formula.
5. What alternatives exist if my target market treats valerian as a medicine?
GABA, L-theanine and glycine are relaxation and sleep ingredients that Japan can manufacture as foods and that have their own separate evidence base — see our guides to each. They are not valerian substitutes with matching effects, since each works differently and is studied on its own terms.
Sources: Ministry of Health, Labour and Welfare, list of substances not judged to be medicines unless medicinal effects are claimed (食薬区分における成分本質の取扱いの例示), listing カノコソウ (キッソウコン／セイヨウカノコソウ／ワレリア), root and rhizome; “Valerian for sleep: a systematic review and meta-analysis”, Am J Med 2006, PMID 17145239; “Valerian Root in Treating Sleep Problems and Associated Disorders-A Systematic Review and Meta-Analysis”, J Evid Based Integr Med 2020, PMID 33086877. Checked on 25 September 2026.