The name field of this product page reads “沖縄県産海ぶどう” (sea grapes produced in Okinawa Prefecture), but the page does not say where in Okinawa they were grown, so that is not confirmed. With raw sea grapes, it is hard to tell how to store them and how long they last, so buyers often purchase without knowing how many people the amount serves or by when to eat them. This article organizes the published product information and the Rakuten Ichiba reviews for the raw sea grapes, 300g (100g×3 packs), sold by Kinchanchi no Umibudo (金ちゃんちの海ぶどう), into five points: contents, storage and shelf life, ingredient labeling, gift suitability, and reviews.
What We Confirmed
- Contents and a rough number of servings
- Storage method and shelf life
- Ingredient and allergen labeling
- Whether it is suitable as a gift
- Trends in published 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 | 【生】海ぶどうたっぷり入って300g（100g×3パック）小分け（金ちゃんちの海ぶどう） (Raw sea grapes, 300g with plenty of sea grapes (100g×3 packs), divided into portions) |
|---|---|
| Name | 沖縄県産海ぶどう (sea grapes produced in Okinawa Prefecture)Source: product description on the Rakuten Ichiba product page (viewed October 12, 2026) |
| Amount | Sea grapes 100g×3 packs (300g in total) / sauce 10ml×6 sachets. A rough number of servings is not stated on the product page and is not confirmedSource: product description on the Rakuten Ichiba product page (viewed October 12, 2026) |
| Storage Method | The storage field of the Rakuten Ichiba product description says to store away from direct sunlight and, once opened, to be sure to keep it in the refrigerator and use it soon. On the other hand, the product page for a single 100g pack on the same shop’s official website (a different specification from the item in this article) says the storage method is ambient temperature and that, because sea grapes are sensitive to cold, you should never put them in the refrigerator. The two statements conflict, so this article does not settle on either one and presents each as stated. Please also check the instructions that come with the product and the shop’s own listing.Source: product description on the Rakuten Ichiba product page / the shop’s official-website product page for the single 100g pack (both viewed October 12, 2026) |
| Best-Before Date | 5 days from the shipping date. The product description says to eat it soon regardless of the best-before dateSource: product description on the Rakuten Ichiba product page (viewed October 12, 2026) |
| Country of Origin | The name field reads “沖縄県産海ぶどう” (sea grapes produced in Okinawa Prefecture). The area within Okinawa is not confirmed. An image on the product page describes them as sea grapes grown at the producer’s aquaculture farmSource: product description and explanations in images on the Rakuten Ichiba product page (viewed October 12, 2026) |
| Place of Processing | Not confirmed |
| Condition / How to Eat | Sea grapes labeled “生” (raw) in the product name. We did not find guidance on whether heating is needed. The images on the product page include serving ideas (recipes)Source: product name and explanations in images on the Rakuten Ichiba product page (viewed October 12, 2026) |
| Delivery | Ambient-temperature delivery. The number of days before shipping is not stated on the product page and is not confirmedSource: product description on the Rakuten Ichiba product page (viewed October 12, 2026) |
| Manufacturer | Not confirmed (the product page lists kinchanchi (金ちゃんちの海ぶどう) as the seller. An explanation in an image says the shop does not ship directly from the producer but checks and divides the sea grapes into portions one by one at the shop)Source: product description and explanations in images on the Rakuten Ichiba product page (viewed October 12, 2026) |
| Shop | Kinchanchi no Umibudo (金ちゃんちの海ぶどう) (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
Ingredients: sea grapes / kubirezuta (クビレズタ) (seaweed)Source: product description on the Rakuten Ichiba product page (viewed October 12, 2026)
The allergen labeling (specified ingredients and similar) field could not be found on the product page and is not confirmed. The ingredients and allergen labeling of the included sauce (10ml×6 sachets) are also not stated on the product page and are not confirmed.
A note in the product description says that sea grapes may rarely contain small shrimp, pill-shaped crustaceans called kotsubumushi (コツブムシ), creatures that live in seagrass beds, or other seaweed, and to remove them and rinse lightly under running waterSource: product description on the Rakuten Ichiba product page (viewed October 12, 2026). If you have a food allergy, please ask the seller before buying, and be sure to check the label on the product when it arrives.
Reference: Consumer Affairs Agency, Japan, “About Allergen Labeling” (accessed October 12, 2026)
Five Things to Check Before Buying
| What to check | For this product | Source |
|---|---|---|
| 1. Amount and number of servings | Sea grapes 100g×3 packs (300g in total), sauce 10ml×6 sachets. A rough number of servings is not confirmed | Product description on the Rakuten Ichiba product page |
| 2. Storage and shelf life | The best-before date is 5 days from the shipping date. For storage, the Rakuten Ichiba product description (once opened, be sure to keep it in the refrigerator) and the shop’s official-website page for the single 100g pack (never put it in the refrigerator) conflict, and we cannot settle on either one | Rakuten Ichiba product page / the shop’s official website (viewed October 12, 2026) |
| 3. Ingredients and allergen labeling | Ingredients are sea grapes / kubirezuta (seaweed). The allergen labeling field and the sauce ingredients are not confirmed | Product description on the Rakuten Ichiba product page |
| 4. Suitable as a gift? | An option for noshi (gift wrapping label) appears in the order information, but the inscription types, wrapping, and message card are not confirmed. Because the best-before date is 5 days from the shipping date, you need to confirm when the recipient can receive it | Rakuten Ichiba product page (order information and product description) |
| 5. Trends in reviews | We read the first 60 Rakuten Ichiba reviews in the default order and all of the 1★ and 2★ reviews (98 in total). Posts range from August 2013 to September 2026; the latest is September 24, 2026 (the latest among those filtered to 1★ and 2★ is April 2022). These trends may not reflect the product’s current condition. Many reviews praise the texture, the size of the beads, and the included sauce, while some 1★ and 2★ reviews mention odor, shrinking, and delivery that did not match the specified date | Rakuten customer reviews (viewed October 12, 2026) |
Suitable as a Gift?
The order information on the Rakuten Ichiba product page shows an option for noshi (gift wrapping label) (confirmed October 12, 2026). However, the inscription types on the noshi, the wrapping, and the message card are not described on the product page and are not confirmed.
This product has a best-before date of 5 days from the shipping date and arrives by ambient-temperature delivery. If you are considering it as a gift, checking in advance when the recipient can receive it makes mix-ups less likely. Among the reviews we read, one post said it was sent as a Father’s Day gift and was welcomed (Source: Rakuten customer reviews, viewed October 12, 2026).
What Public Reviews Say
We organized the Rakuten Ichiba product reviews by point of view. The rating figures reflect the time we viewed the page and will change afterward.
| Site | Rating | Count | Viewed on |
|---|---|---|---|
| Rakuten customer reviews (product page) | 4.72 / 5 | 2,099 | October 12, 2026 |
Rating breakdown: 5★ 1,682 / 4★ 309 / 3★ 70 / 2★ 20 / 1★ 18 (as shown on Rakuten Ichiba, viewed October 12, 2026)
What we read: the first 60 reviews in Rakuten’s default order (posted November 2013 to September 2026; latest September 2026), plus all reviews filtered to 1★ and 2★ (18 at 1★, posted July 2014 to April 2022; 20 at 2★, posted August 2013 to August 2021), 98 in total. These are trends within what we read and may not reflect the product’s current condition.
What Reviewers Praise
Popping, plump texture
25 of the 60 reviews in the default order (7 of them posted within the last two years) mention the popping bite or the plump texture.
Size of the beads and generous amount
10 of the 60 reviews (4 of them within the last two years) mention the size of the beads or that there was more in the pack than expected.
The included sauce goes well
16 of the 60 reviews (2 of them within the last two years) mention that the included sauce went well with the sea grapes.
Packaging and freshness
22 of the 60 reviews (1 of them within the last two years) mention packaging touches such as insulation, or the freshness of the sea grapes on arrival.
Source: Rakuten customer reviews (viewed October 12, 2026)
What Reviewers Note
Odor and a sea smell
9 of the 38 reviews filtered to 1★ and 2★ mention an odor or a sea smell that bothered them. All were posted between 2014 and 2021, and none within the last two years.
Shrinking and turning white
9 of the 38 reviews filtered to 1★ and 2★ mention the sea grapes shrinking or turning white because of cold or delayed arrival. All were posted between 2014 and 2021, and none within the last two years.
How to check: The storage statements are listed with their sources in the “Storage Method” row of this article’s “Basic Information” section.
Arrived on a different day than specified, or late
11 of the 38 reviews filtered to 1★ and 2★ mention delivery that did not match the specified date or arrived late. All were posted between 2013 and 2021, and none within the last two years.
How to check: The delivery method is noted in the “Delivery” row of this article’s “Basic Information” section.
Source: Rakuten customer reviews (viewed October 12, 2026)
Who It Suits / Who Should Be Careful
Who It Suits
- Want raw sea grapes in 100g portion packs
- Looking for a set that comes with sauce
- Looking for sea grapes delivered by ambient-temperature delivery
- Can finish them within the best-before period of 5 days from the shipping date
Who Should Be Careful
- Want to settle on a single storage method before buying (Rakuten Ichiba and the official website conflict)
- Want to check the sauce ingredients and allergen labeling before buying (not confirmed)
- Want to specify the noshi inscription or wrapping for a gift (not confirmed)
- Find it hard to adjust the day you receive it
Prices, stock, shipping fees, and delivery dates are subject to change. This article’s information-as-of date is October 12, 2026. Please be sure to check the listing at the link before purchasing.
This article contains affiliate links (advertising). Editorial Policy
Summary
- Sea grapes 100g×3 packs (300g in total) come with sauce 10ml×6 sachets. A rough number of servings is not confirmed
- The best-before date is 5 days from the shipping date. The storage statements on Rakuten Ichiba and on the shop’s official website conflict, so also check the instructions that come with the product
- Many reviews praise the texture, the size of the beads, and the sauce. The points of concern (odor, shrinking, delivery that did not match the specified date) come mainly from older 1★ and 2★ posts, with none within the last two years
Related Pages
This article organizes information published on sales sites and review sites. Product details such as amount, storage method, and ingredients may 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 12, 2026 / Sources: Rakuten Ichiba “Kinchanchi no Umibudo” (金ちゃんちの海ぶどう) product page, the shop’s official website, Rakuten customer reviews, Consumer Affairs Agency, “About Allergen Labeling”
![Featured image. Product photo of Masuyone Echizen Amaebi without roe 500g (small size, wakeari): reddish shell-on sweet shrimp (amaebi) with heads and long antennae, piled tightly across a black bowl. Text the shop placed in the image: “訳ありでお得な［越前甘えび］をたっぷりとお届け。” (a generous helping of the good-value wakeari [Echizen amaebi]) and “［訳あり］子なし越前甘えび 500g” ([wakeari] Echizen amaebi without roe, 500g)](https://ochinity.com/wp-content/uploads/2026/10/eye-ebi-masu10000332-en-300x158.webp)
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