This miso is described on its product page with the words “生糀” (raw koji) and “発酵止め不使用” (fermentation not stopped), so questions such as “how should it be stored?” and “what condition will it arrive in?” tend to come up. This article organizes the information on the Rakuten Ichiba product page and in its reviews for Yamasa Miso Koji-ten (やまさ味噌こうじ店)’s Kuradashi Nama Miso 800g into five points: quantity, storage and shelf life, ingredient labeling, suitability as a gift, and reviews.
What We Confirmed
- Quantity and number of servings
- Storage method and shelf life
- Ingredients and allergen labeling
- Whether it works as a gift
- Trends in public reviews
Basic Information
This table transcribes what is stated on the product page. However, the “not confirmed” labels and any notes we add are our own.
| Product Name | Yamasa Miso Koji-ten Kuradashi Nama Miso 800g (やまさ味噌こうじ店 蔵出し生味噌 800g) |
|---|---|
| Name | Kuradashi, sold-by-weight raw koji miso (蔵出し量り売り生糀味噌)Source: Rakuten Ichiba product page (viewed October 9, 2026) |
| Amount | 800g (1 bag). No other sizes are listed in the capacity selection fieldSource: same as above |
| Storage Method | Cool, dark placeSource: Rakuten Ichiba product page description |
| Best-Before Date | 1 yearSource: same as above |
| Ingredients | Soybeans, rice koji, saltSource: same as above |
| Raw Material Origin | The product description states that it uses first-grade large-grain soybeans from Aomori Prefecture, rice from Aizu, and Sanuki natural saltSource: same as above |
| Place of Processing | Yabuki Town, Nishishirakawa District, Fukushima Prefecture (listed as the manufacturer’s address)Source: same as above |
| State / How to Eat (Whether Heating Is Required) | The product name and description say “生みそ” (raw miso) and “生糀” (raw koji), and the description says “発酵止め不使用” (fermentation not stopped). Whether heating is required and how to eat it are not confirmedSource: same as above |
| Shipping | Nekopos (mailbox delivery). The page states that the miso is bagged after the order is receivedSource: same as above |
| Manufacturer | 401 Nakamachi, Yabuki Town, Nishishirakawa District, Fukushima Prefecture (no business name is listed; the shop name is Yamasa Miso Koji-ten)Source: same as above |
| Shop | Yamasa Miso Koji-ten Rakuten Ichiba Store (やまさ味噌こうじ店 楽天市場店) (Rakuten Ichiba) |
Prices are not listed here because they change. Please check the current price and stock availability at the link above.
Ingredients and Allergen Labeling
The ingredients are listed as “大豆、米糀、食塩” (soybeans, rice koji, salt). However, within what we could check, the product page has no allergen (specified ingredients) labeling field. This item is not confirmed. The ingredient list does show that soybeans are included.
If you have an allergy, please be sure to check the collective food labeling on the product when it arrives. If you want to check before buying, you can also contact the seller.
Reference: Consumer Affairs Agency, Japan, “About Allergen Labeling” (accessed October 9, 2026)
Five Things to Check Before Buying
| What to Check | For This Product | Basis |
|---|---|---|
| 1. Amount and Number of Servings | 800g (1 bag). The number of servings is not stated | Rakuten Ichiba product page description |
| 2. Storage Method and Shelf Life | Storage method: cool, dark place; best-before date: 1 year. We could not confirm a refrigeration instruction in the shop’s current guidance, so whether refrigeration is needed is not confirmed | Rakuten Ichiba product page description |
| 3. Ingredients and Allergen Labeling | Ingredients: soybeans, rice koji, salt. The allergen labeling field is not confirmed | Rakuten Ichiba product page description |
| 4. Suitable as a Gift | We could not find any statement on noshi (gift wrapping label), packaging, or message cards (not confirmed). It arrives by Nekopos, delivered to the mailbox | Rakuten Ichiba product page (gift options field and product description) |
| 5. Review Trends | Rakuten Ichiba’s rating is 4.81 out of 5 (700 reviews). We read the first 60 reviews in Rakuten’s default order (posted October 2025 to October 2026; latest October 2026), all 2 of the 2★ reviews (posted June 2024 to July 2026), and all 16 of the 3★ reviews (posted April 2021 to May 2026); there are 0 1★ reviews. These are trends within what we read and may not reflect the product’s current state. Many comments mention repeat purchases, sweetness and mildness, the presence of koji, and reassurance about no additives, while the 2★ and 3★ reviews point to salty-taste preferences and the condition on arrival | Rakuten customer reviews (viewed October 9, 2026) |
Suitable as a Gift?
In the gift options field of the product page, we could not find any statement that noshi (gift wrapping label), packaging, or message cards are supported (source: Rakuten Ichiba product page, viewed October 9, 2026). The product description lists occasions such as oseibo (year-end gift), ochugen (mid-year gift), and uchiiwai (gift to celebrate a happy event), but this is just a list of uses and not a sentence explaining support for noshi or wrapping.
- Noshi: whether it is supported and which inscription types are available are not confirmed
- Packaging / gift box: not confirmed
- Message cards / name printing: not confirmed
- Delivery: stated as Nekopos (mailbox delivery). Delivery slips have been discontinued; if you want one, the page asks you to write “納品書希望” (delivery slip requested) in the comment field on the order screen
If you are considering it as a gift, checking with the seller before purchasing whether these are supported can help avoid misunderstandings. We read the first 60 reviews in Rakuten’s default order and all 18 of the 2★ and 3★ reviews, but found no post saying it was used as a gift (source: Rakuten customer reviews, viewed October 9, 2026). These are trends within what we read and may not reflect the product’s current state.
What Public Reviews Say
We organized the product reviews on Rakuten Ichiba by theme. The rating figures are as of the time we viewed them and may change afterward. These are trends within what we read and may not reflect the product’s current state.
| Site | Rating | Reviews | Viewed |
|---|---|---|---|
| Rakuten customer reviews (product page) | 4.81 / 5 | 700 | October 9, 2026 |
Rating breakdown: 5★ 588 / 4★ 94 / 3★ 16 / 2★ 2 / 1★ 0 (as shown on Rakuten Ichiba, viewed October 9, 2026)
What we read: the first 60 reviews in Rakuten’s default order (posted October 2025 to October 2026; latest October 2026), all 2 of the 2★ reviews (posted June 2024 to July 2026), and all 16 of the 3★ reviews (posted April 2021 to May 2026), 78 in total (there are 0 1★ reviews). These are trends within what we read and may not reflect the product’s current state.
What Reviewers Praise
Repeat purchases
Of the 60 reviews in the default order, about 22 said they buy it repeatedly or plan to buy it again. Some also mention ordering several bags at once.
Sweetness and mildness
About 14 of the 60 reviews mention sweetness or mildness when made into miso soup.
Presence of koji
About 16 of the 60 reviews mention a sense that the koji (malted rice) is alive, or that grains of koji remain after the miso is dissolved.
Reassurance about no additives
About 17 of the 60 reviews give being additive-free as a reason for choosing it or a reason for feeling reassured.
Source: Rakuten customer reviews (viewed October 9, 2026)
What Reviewers Note
Salty-taste preferences
Of all 18 of the 2★ and 3★ reviews, 4 (three 3★ and one 2★) said the miso tasted too salty or did not suit their taste. These were posted between 2023 and 2025. Note that the 60 reviews in the default order also include posts saying the saltiness was just right.
How to check: the ingredients are summarized in the “Ingredients” row of “Basic Information” in this article. Within what we could check, the product page had no nutrition information such as salt equivalent.
Condition on arrival
Of all 18 of the 2★ and 3★ reviews, 5 mentioned the condition at delivery, such as arriving at room temperature, a torn box, or a long delivery time. These were posted between 2021 and 2026, and the latest is from July 2026 (2★). One 2023 post says the enclosed paper recommended refrigerated storage, but the product page gives the storage method as a cool, dark place, and refrigeration guidance is not confirmed.
How to check: the storage method is summarized in the “Storage Method” and “Best-Before Date” rows of “Basic Information” in this article.
Source: Rakuten customer reviews (viewed October 9, 2026)
Who It Suits / Who Should Be Careful
Who It Suits
- Want to try a miso whose product page says “無添加” (additive-free) and “生糀” (raw koji)
- Fine with miso in which grains of koji remain
- Want to receive one 800g bag by mailbox delivery
Who Should Be Careful
- Have an allergy (the labeling field is not confirmed, so you need to check the label when it arrives)
- Want to confirm in advance whether refrigeration is needed (the shop’s guidance is not confirmed)
- Want to use it as a gift with noshi or wrapping (support is not confirmed)
- Have clear preferences about saltiness or sweetness
Prices, stock, shipping fees, and delivery dates are subject to change. This article’s information-as-of date is October 9, 2026. Please be sure to check the listing at the link before purchasing.
This article contains affiliate links (advertising). Editorial Policy
Summary
- The amount is one 800g bag, with a single size option. The storage method is stated as a cool, dark place and the best-before date as 1 year
- The ingredients are soybeans, rice koji, and salt. We could not confirm the allergen labeling field or support for noshi and wrapping on the product page
- Reviews rate it highly, with many repeat-purchase comments. Some also point to salty-taste preferences and the condition on arrival, so check the storage method against the labeling on the product you receive
Related Pages
This article organizes information published on various retail and review sites. Product details such as quantity, storage method, and ingredients are subject to change. Please check the seller’s listing for the latest information.
Comments on taste or quality are summarized from third-party posts cited with their source, and are not Ochinity’s own evaluation. Our approach to writing articles is described in our Editorial Policy.
Information as of: October 9, 2026 / Sources: Rakuten Ichiba “やまさ味噌こうじ店 楽天市場店” product page, Rakuten customer reviews, Consumer Affairs Agency, Japan, “About Allergen Labeling”
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