For oysters labeled “Jumbo,” it’s hard to tell from the product page alone how large the individual pieces actually are, or how many minutes of cooking they need. “Jumbo” in the product name is a grade the shop itself has assigned, and it does not indicate any superiority in quality. In this article, we’ve organized the publicly available product information and review-site listings for Echizen Kani Shokunin Kouragumi (DENSHOKU)’s Jumbo Hiroshima Oysters 1kg into five points: contents and grade, storage, whether cooking is required, suitability as a gift, and reviews.
What We Confirmed
- Contents and grade
- Storage method and whether cooking is required
- Ingredient and allergen labeling
- Whether it’s suitable 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 1kg (thawed: 850g / about 26-35 pieces)Source: Rakuten Ichiba product page (accessed September 25, 2026) |
|---|---|
| Name | Shucked oyster meat, produce of HiroshimaSource: Product description on the product page (no independent “name” field is shown; accessed September 25, 2026) |
| Contents | 1kg (thawed: 850g / about 26-35 pieces, 2L / 3L size). 2L and 3L are grade names the shop has assigned and do not indicate any ranking or superiority in qualitySource: Product description on the product page |
| Part used | Shucked meat (no shell)Source: Product description on the product page |
| Storage | Store frozen (about 1 month in a home freezer)Source: Product description on the product page |
| Best-by | The “best-by” field states about 1 month in a home freezer (no specific expiration date is shown)Source: Product description on the product page (accessed September 25, 2026) |
| Country/region of origin | Produce of Hiroshima Prefecture (farmed in Hiroshima Bay)Source: Product description on the product page |
| Place of processing | Not confirmed (the item ships from a freezer warehouse in Tsuruga, Fukui Prefecture, the seller’s address, but the page does not state whether this is the same as the place of processing) |
| State / how to eat (whether cooking is required) | The seller’s product page states the product is for cooking and not for raw consumption, and explains that it needs to be heated to a core temperature of 85°C for at least 1 minuteSource: Product description on the product page (accessed September 25, 2026) |
| Thawing method | Thawing under running water is recommended. Thawing at room temperature or by heating is described as not recommended because it can affect quality, and the page advises cooking as soon as possible (the same day) after thawingSource: Product description on the product page |
| Shipping | Frozen deliverySource: Shipping information on the product page (ships in about 2-3 business days; accessed September 25, 2026) |
| Manufacturer | Not confirmed (the page shows only “Seller: Denshoku Co., Ltd. (株式会社伝食),” with no separate listing for a manufacturer or processor)Source: Product description on the product page |
| Shop | Echizen Kani Shokunin Kouragumi (DENSHOKU) (Rakuten Ichiba) |
The product name shown on the Rakuten Ichiba product page includes the words “Rakuten Ranking No. 1” and “Rakuten Gourmet Award winner.” This is wording the shop itself has added; which award or ranking it refers to (organizer, category, and time period) cannot be identified on the product page and is not confirmed, and it does not indicate any superiority in quality.
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, the product page does not show an ingredient list, additives, or allergen labeling. This item is not confirmed.
Oysters (kaki) are a type of shellfish. If you have a shellfish allergy, or want to check additives used in processing, ask the shop before buying or check the label on the product when it arrives.
Reference: Consumer Affairs Agency, Japan, “About Allergen Labeling” (accessed September 25, 2026)
Five Things to Check Before Buying
| What to check | For this product | Basis |
|---|---|---|
| 1. Contents and grade | 1kg (thawed: 850g / about 26-35 pieces). Shucked meat in 2L/3L size, with no other grade options | Product description on the product page |
| 2. Storage and whether cooking is required | Store frozen (about 1 month in a home freezer). For cooking, not raw consumption; needs to be heated to a core temperature of 85°C for at least 1 minute | Product description on the product page |
| 3. Ingredient and allergen labeling | Not confirmed (not shown on the page) | Checked both the Rakuten Ichiba and Yahoo! Shopping product pages; the official site could not be identified |
| 4. Whether it’s suitable as a gift | Noshi (gift labels) available. We could not confirm the types of noshi inscription, gift-box packaging, or message cards | Rakuten Ichiba product page |
| 5. Trends in reviews | The Rakuten Minna no Review rating is 4.64/5 (19,849 reviews, accessed September 25, 2026). We read 18 reviews under the default sort order (standard); posts ranged from October 5, 2025 to September 22, 2026 (most recent: September 22, 2026), and this sort order may not reflect the product’s current state. Many comments praised the size of the pieces, the plump texture, and the convenience of individually quick-frozen pieces you can use as needed, while some noted the size or a smell right after thawing | Rakuten Minna no Review (accessed September 25, 2026) |
Suitable as a Gift?
Noshi (gift labels) are available. You can have one added when you order, so it works as a giftSource: Rakuten Ichiba product page (checked September 25, 2026). However, the types of noshi inscription (such as for ochugen, oseibo, or uchiiwai), gift-box packaging, and message cards are not shown on the product page and are not confirmed. If you’re considering this as a gift, checking the following with the shop before purchase can help avoid misunderstandings.
- Which types of noshi inscription are supported
- Whether gift-box packaging or message cards are available (not stated on the product page)
- Since it ships by frozen delivery, whether you can specify a delivery date and time the recipient can receive it
What Public Reviews Say
Below is a summary of the ratings and review content publicly posted on Rakuten Ichiba. The rating figures are as of the time we checked and will change afterward. The Rakuten Minna no Review rating is 4.64/5 (19,849 reviews, accessed September 25, 2026). We read 18 reviews under the default sort order (standard); this sort order may not reflect the product’s current state.
What Reviewers Praise
Many comments praise the size of the pieces, the plump texture, and the good flavor. The convenience of individually quick-frozen pieces you can use as needed, and repeat purchases, are also frequently mentioned.
Source: Rakuten Minna no Review (accessed September 25, 2026, summarized)
What Reviewers Note
A small number of reviewers noted the pieces were smaller than a previous order, a slight fishy smell right after thawing that went away after prepping, or that the texture felt a bit soft because the product is frozen.
Source: Rakuten Minna no Review (accessed September 25, 2026, summarized)
Who It Suits / Who Should Be Careful
Who It Suits
- Want oysters without the hassle of shucking
- Plan to cook them, e.g., fried, in hot pot, or in takikomi rice
- Want individually quick-frozen pieces you can use as needed
- Have about 1kg of freezer space
Who Should Be Careful
- Have a shellfish allergy (labeling is not confirmed, so ask before buying)
- Want to eat them raw (this product is for cooking, not raw consumption)
- Don’t want variation in piece size
- Want to specify gift details such as noshi inscription or gift-box packaging
Prices, stock, shipping fees, and delivery dates are subject to change. This article’s information-as-of date is September 25, 2026. Please be sure to check the listing at the link before purchasing.
This article contains affiliate links (advertising). Editorial Policy
Summary
- 1kg (thawed: 850g / about 26-35 pieces) of shucked meat for cooking. 2L/3L size, with no other grade options
- Store frozen (about 1 month in a home freezer). For cooking, not raw consumption; needs to be heated to a core temperature of 85°C for at least 1 minute
- Ingredient and allergen labeling could not be confirmed on the product page. If you have a shellfish allergy, check with the seller before buying
Related Pages
This article organizes information publicly available on each retailer’s site. Product details such as contents, 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: September 25, 2026 / Sources: Rakuten Ichiba “Echizen Kani Shokunin Kouragumi (DENSHOKU)” product page, Rakuten Minna no Review, Consumer Affairs Agency, Japan, “About Allergen Labeling”
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