Roubai organic pure rice vinegar: every ingredient on the label
河原酢造 老梅 有機純米酢
A rice vinegar made by 河原酢造 in Ono, Fukui Prefecture, from only organically grown rice from Japan. The ingredient list is just one item, “有機栽培米（国産）” (organically grown rice (Japan)), and there are no additives.
Checking the ingredient list against the additives you flagged.
Choose additives to flag →The label on the back
| 名称Name | 有機米酢 |
|---|---|
| 原材料名Ingredient list | |
| 酸度Acidity | 4.5% |
| 内容量Content | 500ml |
| 賞味期限Best-before date | ラベルに記載 |
| 保存方法Storage method | 直射日光と高温を避けて、常温で保存してください。 |
| 製造者Manufacturer | 合名会社河原酢造 福井県大野市吉8-25 |
| Energy エネルギー | 2kcal |
| Protein たんぱく質 | 0.3g |
| Fat 脂質 | 0g |
| Carbohydrate 炭水化物 | 0.3g |
| Salt equivalent 食塩相当量 | 0g |
Copied from the package as of the date checked. The label is shown in Japanese as printed; tap an ingredient to see its English name and role. The links in the table below lead to our Ingredients A–Z and food additive database. The name on the label is “有機米酢” (organic rice vinegar), and the product name on the official site is “老梅 有機純米酢”. “老梅” (Roubai) is a registered trademark of the company, and the label says “老” means long aging and “梅” means a traditional acidulant (ume is not one of the ingredients). The label says “開封後は冷蔵をおすすめします” (refrigeration is recommended after opening), and the official site’s FAQ says the best-before date is 2 years from bottling and recommends refrigeration in summer. On the official site, you can enter the best-before date to look up the “製造履歴” (production history), which shows the rice grower, the brewing date and the bottling date.
Ingredients, one by one
| On the label | Type | Role | Notes |
|---|---|---|---|
| 有機栽培米（国産）organically grown rice | Ingredient | Main ingredient (the only ingredient) | Rice grown to the Organic JAS standard. Only products certified under Organic JAS may be labeled “有機” (organic), and the official site explains that 河原酢造 is certified by JONA (Japan Organic & Natural Foods Association). The rice is grown by the company itself in Ono, Fukui, and is also bought from growers in Ishikawa and Akita, it says. The official site explains that the vinegar is made by turning rice into sake with koji, then into vinegar with acetic acid bacteria, and leaving it still while a film of the bacteria forms on the surface (“静置醗酵”, static fermentation). Because “アルコール” (alcohol) is not in the ingredient list, the sake that is the base of the vinegar is also made only from rice. |
Not found in the ingredient list
This is not the maker's “not used” claim. These are things often seen in similar products that we checked are not written in this product's ingredient list. Additives carried over from ingredients may not be declared, so this does not mean they are absent (about additives not written on labels).
Next to a typical product
有機栽培米（国産）
米（国産）、アルコール
Ingredient list from Mizkan’s official page (checked 2026-09-30). Neither lists additives. The differences are that Mizkan’s rice vinegar has “アルコール” (alcohol) in its ingredient list, so alcohol is also used as a raw material for the vinegar besides rice, and that the rice in Roubai is organically grown.
Good points and concerns
+Good points
- The only ingredient is organically grown rice from Japan, and there are 0 additives
- No alcohol is added as a raw material for the vinegar (the ingredient list is rice only)
- On the official site, you can look up the rice grower, brewing date and bottling date from the best-before date
−Concerns
- ¥572 for 500 ml (about ¥114 per 100 ml). Raised from ¥496 in March 2026 (official price revision notice)
- Orders from the official site cost ¥500 shipping for fewer than 6 bottles. Payment is by postal transfer or cash on delivery (official FAQ)
- The label says refrigeration is recommended after opening. Refrigeration is recommended in summer (official FAQ)
Related articles
Sources
- Mail-order products | 河原酢造 “老梅 有機純米酢”
- Our vinegar making | 河原酢造
- Company profile | 河原酢造
- Frequently asked questions | 河原酢造
- Organic certification | 河原酢造
- “米酢” (rice vinegar) | Mizkan Group product information
- Label on the back of the package (checked 2026-09-30)
This page is a translation of our Japanese page; if they differ, the Japanese page is the reference.
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