These are 2kg of shell-on oysters sold on Rakuten Ichiba by 松島牡蠣屋 in Matsushima, Miyagi District, Miyagi Prefecture (the processor is 菊地水産合同会社), with the harvest area shown as Miyagi Prefecture. The shop labels the product as “生食用殻付きかき” (shell-on oysters for raw consumption), and advises customers to check the sticker on arrival to see whether the oysters are for raw consumption (生食用) or for cooking (加熱用). The 2kg weight includes both the shells and the oysters inside, and the count is a guide of 14 to 35 oysters. We have organized what the Rakuten Ichiba listing and reviews say into five points: contents, shelf life, ingredient labeling, gift use and reviews. The features confirmed on the listing are three: they are shell-on oysters labeled as requiring refrigeration rather than frozen, the amount is 2kg including shells, and the use-by date is short at within 4 days including the shipping date.
At a Glance
Key points
- 2kg including shells and oysters (a guide of 14 to 35 oysters). The listing says the count varies by season and is roughly 9 oysters per 1kg as a guide
- Shell-on, labeled as requiring refrigeration rather than frozen. Of the 6 oyster products featured on Ochinity (as of October 21, 2026), among the 5 whose temperature labeling we could confirm, this is the only one that is not frozen (weak point: the use-by date is within 4 days including the shipping date)
- The shop labels it as 生食用 (for raw consumption). The shop advises checking the sticker on arrival to see whether the oysters are for raw consumption or for cooking
- Rakuten rating: 4.49 (2,846 reviews). Viewed October 21, 2026. This is the lowest figure among the 6 oyster products featured on Ochinity (as of October 21, 2026)
Watch out for
- The listing says the product photos were taken in the peak season of May and June, and that from September to March the oysters look very different from the photos
- If you want to keep them longer, the frozen Jumbo Hiroshima Oysters 2kg (for Cooking) is a frozen product of the same 2kg
Suits: Someone who wants to receive 2kg of shell-on oysters that are not frozen in one delivery, and can finish them within 4 days including the shipping date
The comparison covers the 6 oyster products featured on Ochinity (as of October 21, 2026). Each value is from the information-as-of date of its own article and may differ from the current details. Features are from the Rakuten Ichiba listing (viewed October 21, 2026). The rating is as shown on Rakuten (viewed October 21, 2026) and may not represent the product’s current condition.
Compared with 6 Similar Oyster Products
The 6 oyster products featured on Ochinity (as of October 21, 2026). Each value is from the information-as-of date of its own article and may differ from the current details. Ratings are as shown on Rakuten and may not represent the product’s current condition. The fewer the reviews, the more easily the figure moves. This article is listed first, and the others are in the Japanese syllabary (gojūon) order of their product names.
| Product | Total amount | Temperature labeling | Rakuten rating |
|---|---|---|---|
| 松島牡蠣屋 Shell-On Oysters for Raw Consumption 2kgThis article; weight including shells and oysters | 2kg | Keep refrigerated | 4.492,846 reviews |
| Oki Iwagaki Haruka Rock Oysters | 2kg | Not confirmed | 4.69631 reviews |
| Jumbo Hiroshima Oysters 1kg | 1kg | Frozen | 4.6419,849 reviews |
| Jumbo Hiroshima Oysters 2kg (for Cooking) | 2kg | Frozen | 4.687,230 reviews |
| Hiroshima Frozen Oysters (for Cooking) | 1kg | Frozen | 4.832,883 reviews |
| Hiroshima Steamed Oysters | 1kg | Frozen | 4.77934 reviews |
Click a product name to go to that product’s article. The total amounts are values noted in each article for comparison; some include the weight of shells and some are frozen weights, so they do not compare the amount of edible oyster meat. The 2kg for this product is the weight including shells and oysters.
- Of the 6 oyster products featured on Ochinity (as of October 21, 2026), among the 5 whose temperature labeling we could confirm, this is the only one labeled as requiring refrigeration rather than frozen. In exchange, its use-by date is short at within 4 days including the shipping date
- The Rakuten rating of 4.49 (2,846 reviews) is the lowest figure among the 6 products (the other 5 range from 4.64 to 4.83)
Basic Information
- Product name
- 松島牡蠣屋 生食用 殻付き牡蠣 (Shell-On Oysters for Raw Consumption) 2kg (from Miyagi Prefecture)
- Contents
- 2kg (weight including shells and oysters; a guide of 14 to 35 oysters)
- Condition
- Shell-on; labeled 生食用 (for raw consumption) (the shop advises checking the sticker on arrival to see whether they are for raw consumption or for cooking)
- Storage
- Keep refrigerated at 5℃ or below
- Use-by date
- Within 4 days including the shipping date
- Origin of ingredients
- Harvest area: Miyagi Prefecture
- Allergen labeling
- Not confirmed
- Noshi / gifts
- Not confirmed (we could not find options for noshi, wrapping or message cards)
This list transcribes what is stated on the listing. However, the “not confirmed” labels and any notes we add are our own.
The listing does not give ingredients or allergen labeling. If you have allergies, be sure to ask the shop before you buy, or check the label on the item when it arrives (reference: Consumer Affairs Agency, Japan, “About Allergen Labeling”, accessed October 21, 2026).
See the transcribed details, sources and “not confirmed” items (14 items)
This list transcribes what is stated on the listing. However, the “not confirmed” labels and any notes we add are our own.
- Product name
- 松島牡蠣屋 生食用 殻付き牡蠣 (Shell-On Oysters for Raw Consumption) 2kg (from Miyagi Prefecture)The product name shown on the Rakuten page is a long string with many search terms. Only the product-name part is shown here.
- Type of food
- “生食用殻付きかき” (shell-on oysters for raw consumption)Source: product description on the Rakuten Ichiba listing (viewed October 21, 2026)
- Contents
- 2kg. The listing says this is the combined weight of the oysters and their shells. The count is a guide of 14 to 35 oysters; the listing explains that it varies considerably by season and is roughly 9 oysters per 1kg, but because the product is sold by the kilogram, the count is only a guide. It also says complaints about the count are not accepted. The number of servings is not stated and is not confirmedSource: product name and product description on the Rakuten Ichiba listing (viewed October 21, 2026)
- Options
- We could not find option fields such as size on the listing, so the options are not confirmed
- Photos vs. the oysters delivered
- The listing says the product photos were taken in the peak season of May and June, and that from September to March the oysters look very different from the photos. It also explains that the shells are washed only lightly because they damage easily, that other marine organisms are removed as far as possible but some remain attached, and that the oysters are packed without being neatly arrangedSource: product description on the Rakuten Ichiba listing (viewed October 21, 2026)
- Storage method
- The listing advises storing them at 5℃ or below and eating them as soon as possibleSource: product description on the Rakuten Ichiba listing
- Best-before date
- Shown as a use-by date of within 4 days including the shipping date (keep refrigerated)Source: product description on the Rakuten Ichiba listing
- Origin of ingredients
- The harvest area is shown as Miyagi PrefectureSource: product description on the Rakuten Ichiba listing
- Place of processing
- Not confirmed. The company profile on Rakuten Ichiba gives the address of the processor, 菊地水産合同会社, as Matsushima, Miyagi District, Miyagi Prefecture, but we could not find it stated as the place of processingSource: company profile on Rakuten Ichiba (viewed October 21, 2026)
- Condition / how to eat (cooking needed?)
- Raw shell-on oysters, labeled 生食用 (for raw consumption) in the name and contents fields. The same product description advises always checking the sticker on arrival to see whether they are for raw consumption or for cooking. We could not find guidance in the product description on how to handle oysters that arrive with their shells open, so this is not confirmedSource: product description on the Rakuten Ichiba listing (viewed October 21, 2026)
- Delivery
- Labeled as requiring refrigeration. The company profile on Rakuten Ichiba says items are shipped by Yamato Transport, Japan Post (Yu-Pack) or Sagawa Express. Whether you can specify a delivery date is not confirmedSource: product description and company profile on the Rakuten Ichiba listing (viewed October 21, 2026)
- Shipping period
- The number of days from order to shipping is not confirmed. The listing says shipping may be postponed when rough seas (shike) continue for days and oysters cannot be landed, that shipments are voluntarily suspended, canceled or postponed when the regular shellfish toxin test is positive, and that the shop will contact customers about adjusting shipments when a norovirus test is positiveSource: product description on the Rakuten Ichiba listing (viewed October 21, 2026)
- Manufacturer
- The listing gives 菊地水産合同会社 as the processor and 松島牡蠣屋 as the seller. The company profile on Rakuten Ichiba gives the address as Matsushima, Miyagi District, Miyagi PrefectureSource: product description and company profile on the Rakuten Ichiba listing (viewed October 21, 2026)
- Noshi / gifts
- We could not find options for noshi (Japanese gift wrapping paper), wrapping or message cards in the gift section of the listing, and the product description does not mention them. All are not confirmedSource: Rakuten Ichiba listing (viewed October 21, 2026)
- Shop
- 松島牡蠣屋 (Rakuten Ichiba)
Prices change, so they are not listed. Please check the latest price and stock at the links above.
What Public Reviews Say
We have organized the Rakuten Ichiba product reviews by theme. Ratings are as of the date viewed and change afterwards. The following are tendencies within the range we read and may not represent the product’s current condition.
| Site | Rating | Reviews | Viewed |
|---|---|---|---|
| Rakuten user reviews (product page) | 4.49 / 5 | 2,846 | October 21, 2026 |
Rating breakdown: ★5 2,043 / ★4 470 / ★3 124 / ★2 91 / ★1 118 (as shown on Rakuten Ichiba, viewed October 21, 2026)
Range read: the first 59 reviews in the default order (posted November 2025 to September 2026, the latest in September 2026), 30 of the 118 ★1 reviews (September 2025 to October 2026, the latest in October 2026) and 30 of the 91 ★2 reviews (January 2025 to September 2026, the latest in September 2026), 119 in total. All the reviews we read were posted within the last two years. Because we filtered for the ★1 and ★2 reviews, their share differs from the overall proportions. These are tendencies within the range we read and may not represent the product’s current condition.
The counts below are approximate figures we counted by reading the reviews, and do not include posts only about delivery or shop service.
What Reviewers Praise
Size and plumpness of the oysters (about 20 of 59)
About 20 of the first 59 reviews in the default order said the oysters were large or well filled. Some reviews said large and smaller oysters were mixed, and some mentioned differences depending on the season.
Generous amount (about 20 of 59)
About 20 of the standard 59 reviews mentioned the large amount. Some reviews said they received around 17 to 30 oysters.
Creamy, rich taste (about 11 of 59)
About 11 of the standard 59 reviews described them as creamy or rich. Some also said they ate them steamed or grilled as well as raw (the reviewers’ own accounts).
Source: Rakuten user reviews (viewed October 21, 2026)
What Reviewers Note
Small or thin oysters
Reviews saying the oysters were small or thin numbered about 9 of the first 59 in the default order, about 11 of the 30 ★1 reviews we read and about 15 of the 30 ★2 reviews.
How to check: the shop’s notes that the photos were taken in the peak season of May and June and look very different from September to March, and that the count is only a guide, are in the “Contents” and “Photos vs. the oysters delivered” rows of the details under “Basic Information” in this article.
Shells arrived open
Reviews mentioning open shells and the choice between eating raw and cooking, such as some oysters arriving with their shells open and being cooked rather than eaten raw for that reason, numbered about 11 of the standard 59, about 6 of the 30 ★1 reviews and about 7 of the 30 ★2 reviews. Most were posted between May and September 2026.
How to check: the shop’s advice to check the sticker on arrival to see whether they are for raw consumption or for cooking is in the “Condition / how to eat (cooking needed?)” row of the details under “Basic Information” in this article.
Smell and harsh aftertaste
About 5 of the 30 ★1 reviews we read and about 5 of the 30 ★2 reviews said the smell or a harsh aftertaste (egumi) bothered them.
How to check: the use-by date (within 4 days including the shipping date) and storage method (5℃ or below) are under “Basic Information” in this article.
Feeling unwell after eating
About 5 of the 30 ★1 reviews we read and about 6 of the 30 ★2 reviews mentioned feeling unwell after eating. These are the reviewers’ own posts; the cause has not been confirmed in this article, and we do not evaluate it.
Source: Rakuten user reviews (viewed October 21, 2026)
Summary: Is This the One for You?
Why choose it: You want shell-on oysters that are not frozen, and you want 2kg in one delivery. If those are your two conditions, then of the 6 oyster products featured on Ochinity (as of October 21, 2026), among the 5 whose temperature labeling we could confirm, this is the only one that meets both (weak points: the use-by date is within 4 days including the shipping date, and the Rakuten rating of 4.49 is the lowest figure among the 6 products).
- The shop labels it as 生食用 (for raw consumption) and advises checking the sticker on arrival to see whether the oysters are for raw consumption or for cooking
- Among the 119 reviews we read, some praised the size of the oysters (about 20 of 59) and the generous amount (about 20), while others said the oysters were small or that shells arrived open
- The listing says the photos were taken in the peak season of May and June, and that the oysters look very different from September to March
Other options: If you want to store them frozen and use them over time, see Jumbo Hiroshima Oysters 2kg (for Cooking, Frozen); if 1kg is enough, see Hiroshima Frozen Oysters 1kg (for Cooking).
This section is based on the Rakuten Ichiba listing and Rakuten user reviews (viewed October 21, 2026). Review tendencies are within the range we read and may not represent the product’s current condition.
Prices, stock, shipping fees, and delivery dates are subject to change. This article’s information-as-of date is October 21, 2026. Please be sure to check the listing at the link before purchasing.
This article contains affiliate links (advertising). Editorial Policy
This article organizes information published on various retail sites 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 21, 2026 / Sources: Rakuten Ichiba “松島牡蠣屋” product page and company profile, Rakuten user reviews, Consumer Affairs Agency, Japan, “About Allergen Labeling”
