Jumbo Hiroshima Oysters 2kg is a frozen product of shucked oysters from Hiroshima, and the seller states that it is for cooking. The “Echizen” in the shop name (Echizen Kani Tonya Masuyone, 越前かに問屋 ますよね) is part of the store’s name, not the place where the oysters were farmed or processed. The product page states that the raw material comes from Hiroshima.
Frozen oysters can be hard to choose: the weight on the bag differs from the weight after thawing, and the guidance on how long they keep in the refrigerator is split. In this article, we organized the publicly available product information and Rakuten customer review descriptions for this product into five points: quantity, storage method, ingredient labeling, suitability as a gift, and reviews.
What We Confirmed
- Quantity and approximate 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 | Jumbo Hiroshima Oysters 2kg (850g after thawing × 2-bag set / about 10 servings *for cooking) (Listed with the promotional wording related to price, track record, and timing, and the string of search keywords, removed from the Rakuten Ichiba product name) |
|---|---|
| Name | Shucked oyster meat from Hiroshima (frozen). The official name label is not confirmedSource: Rakuten Ichiba product page (viewed October 5, 2026) |
| Amount | 1kg (approximately 850g after thawing) × 2 bags, 2kg in total. The seller states about 10 servings and about 60 oysters (both are the seller’s guidelines, and no breakdown of the servings is found on the product page). It also states that the weight drops by 10–20% after thawingSource: Rakuten Ichiba product page description (viewed October 5, 2026) |
| Storage Method | Frozen. Store at −18°C or belowSource: Rakuten Ichiba product page description |
| Best-Before Date | Frozen: within 1 month (1 week recommended). Refrigerated: the product description says “within the day,” while the image in the product description says “within 1 day,” so the labels conflict. The seller advises using it early because a home freezer holds a higher temperature than a commercial one and quality may suffer. Because the refrigerated shelf-life labels conflict, please assume the shorter one (within the day) and check with the shop before purchasingSource: Rakuten Ichiba product page description and the image in the description (viewed October 5, 2026) |
| Raw Material Origin | HiroshimaSource: Rakuten Ichiba product page description |
| Place of Processing | Not confirmed (no description of where the oysters were shucked and frozen is found) |
| State / How to Eat (Whether Cooking Is Required) | Stated as for cooking (the product name carries “*for cooking,” and the product contents in the description also say “for cooking”)Source: Rakuten Ichiba product page |
| Thawing Method | The seller states that instructions for eating and thawing are included. The thawing steps themselves could not be confirmed on the product page and are not confirmedSource: image in the Rakuten Ichiba product page description |
| Shipping | Stated as shipped frozenSource: Rakuten Ichiba product page description |
| Manufacturer | Not confirmed (the seller is listed as 有限会社増米商店 of Tsuruga City, Fukui Prefecture. No description as the manufacturer or processor is found)Source: Rakuten Ichiba product page description |
| Shop | 越前かに問屋 ますよね (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
Within what we could check, we could not find ingredient names or allergen labeling on the product page. This item is not confirmed.
This product is oysters themselves (shellfish). If you have an oyster or shellfish allergy, you cannot eat this product. For any other ingredient, additive, or allergen labeling, please contact the shop before purchasing, or check the collective food labeling on the product when it arrives.
Reference: Consumer Affairs Agency, Japan, “About Allergen Labeling” (accessed October 5, 2026)
Five Things to Check Before Buying
| What to Check | For This Product | Basis |
|---|---|---|
| 1. Amount and Number of Servings | 1kg (approximately 850g after thawing) × 2 bags, 2kg in total. Stated as about 10 servings and about 60 oysters (the seller’s guidelines). The weight is stated to drop by 10–20% after thawing | Product page description |
| 2. Storage Method and Shelf Life | Frozen: −18°C or below, within 1 month (1 week recommended). Refrigerated: there are two labels, “within the day” and “within 1 day,” and they conflict | Product page description and the image in the description |
| 3. Ingredients and Allergen Labeling | Not confirmed (not listed on the page) | Checked the Rakuten Ichiba product page |
| 4. Suitable as a Gift | Noshi is supported. The seller states that gift wrapping is not offered. The types of noshi inscriptions are not confirmed | Gift options field on the product page and the image in the description |
| 5. Review Trends | Rakuten Ichiba’s rating is 4.68 out of 5 (7,230 reviews). Many comments praise the large size of the oysters and being able to use them one by one, while some point out a fishy smell and that they seemed small after cooking. We read the first 60 reviews in the default order (posted November 2008 to September 2026; latest September 2026) and 30 each of the 1★ and 2★ reviews (December 2012 to May 2026), 120 in total; these are trends within what we read and may not reflect the product’s current state | Rakuten customer reviews (viewed October 5, 2026) |
Suitable as a Gift?
The Rakuten Ichiba product page shows that noshi is supported. However, the types of noshi inscriptions (such as oseibo, a year-end gift) are not found on the product page and are not confirmed. The image in the product description says gift wrapping is “not offered.” It also states that when purchased together with other items, the order may arrive in a plain cardboard box. We could not find a description of whether message cards are supported, so this is not confirmed.
If you are considering it as a gift, checking the following with the shop before purchasing can help avoid misunderstandings.
- The types of noshi inscriptions, and whether your preferred inscription is supported
- Because it is shipped frozen, whether you can specify a delivery date and time the recipient can receive it
- Whether the recipient has freezer space for 2kg
Among the reviews we read, some posts said they had sent it as a gift (Source: Rakuten customer reviews, viewed October 5, 2026).
What Public Reviews Say
Below is a summary of the Rakuten Ichiba product reviews, organized by theme. The rating figures are as of the time we viewed them and may change afterward.
| Site | Rating | Reviews | Viewed |
|---|---|---|---|
| Rakuten customer reviews (product page) | 4.68 / 5 | 7,230 | October 5, 2026 |
Rating breakdown: 5★ 5,570 / 4★ 1,247 / 3★ 240 / 2★ 83 / 1★ 90 (as shown on Rakuten Ichiba; viewed October 5, 2026)
What we read: the first 60 reviews in the default order (posted November 2008 to September 2026; latest September 2026), plus 30 each of the 1★ and 2★ reviews (1★: November 2013 to January 2026; 2★: December 2012 to May 2026), 120 in total. Of the 60 reviews at 1★ and 2★ that we read, 5 were posted within the past two years. These are trends within what we read and may not reflect the product’s current state.
What Reviewers Praise
Large size and satisfying bite
Of the 60 reviews in the default order, 34 (17 of them posted within the past two years) mentioned the large size of the oysters and their satisfying bite. Some describe using them in hot pot, fried oysters, and butter-sautéed oysters.
Can be used one by one
Of the 60 reviews in the default order, 10 (4 of them within the past two years) said the oysters were frozen individually, so they could take out just the amount they needed.
Does not shrink easily when cooked
Of the 60 reviews in the default order, 7 (1 of them within the past two years) said the oysters did not shrink easily even when put into hot pot and the like. The posts date from 2010 to 2024.
Source: Rakuten customer reviews (viewed October 5, 2026)
What Reviewers Note
Fishy smell
Of the 60 reviews at 1★ and 2★, 24 (2 of them posted within the past two years) pointed out a fishy smell in the oysters. The posts date from 2013 to 2024.
Seemed small after cooking or thawing
Of the 60 reviews at 1★ and 2★, 23 (3 of them posted within the past two years) mentioned that the oysters that arrived were smaller than expected, or that they became smaller when cooked. Most of these posts date from around 2014 or earlier.
How to check: The guideline for the number of oysters, and the seller’s note that the weight drops by 10–20% after thawing, are summarized in the “Amount” row of “Basic Information” in this article.
Freezer burn, crumbling, and dryness
Of the 30 reviews at 1★, 5 (2 of them posted within the past two years) mentioned variation in quality, such as freezer burn, dryness, and the meat crumbling after thawing.
Source: Rakuten customer reviews (viewed October 5, 2026)
Who It Suits / Who Should Be Careful
Who It Suits
- Want to use it in cooked dishes such as hot pot, fried dishes, and stir-fries
- Want to take out only the amount you need (some reviews say they could use the oysters one by one)
- Value large oysters and a satisfying bite
- Have freezer space for 2kg (approximately 1.7kg after thawing)
Who Should Be Careful
- Have an oyster or shellfish allergy (you cannot eat this product; other ingredient labeling is also not confirmed)
- Want to eat it without cooking (the seller states that it is for cooking)
- Want to be certain in advance how long it keeps in the refrigerator (the labels conflict)
- Want to use it as a gift with gift wrapping (the seller states that gift wrapping is not offered)
Prices, stock, shipping fees, and delivery dates are subject to change. This article’s information-as-of date is October 5, 2026. Please be sure to check the listing at the link before purchasing.
This article contains affiliate links (advertising). Editorial Policy
Summary
- Frozen oysters for cooking: 1kg (approximately 850g after thawing) × 2 bags, 2kg in total. Stated as about 10 servings and about 60 oysters (the seller’s guidelines)
- Store at −18°C or below; frozen, within 1 month (1 week recommended). The refrigerated shelf-life labels conflict: “within the day” and “within 1 day”
- We could not confirm ingredient and allergen labeling on the product page. Noshi is supported, but gift wrapping is not available. If you have an oyster or shellfish allergy, you cannot eat this product
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 5, 2026 / Sources: Rakuten Ichiba “越前かに問屋 ますよね” product page, Rakuten customer reviews, Consumer Affairs Agency, Japan, “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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