This is wild tuna zuke (tuna marinated in a sauce), sold on Rakuten Ichiba by まぐろ処 一条 (株式会社東日本貿易, Iwaki City, Fukushima Prefecture). It comes as 5 packs of 110g (80g of tuna and 30g of sauce each) and arrives frozen. We have organized the contents, thawing method, shelf life, gift options and reviews from the product page and publicly available reviews. The shop describes each pack as one rice bowl (donburi) serving.
At a Glance
Key points
- 5 packs of 110g (80g of tuna and 30g of sauce). The shop describes each pack as one rice bowl (donburi) serving
- It arrives frozen, marinated in the sauce. The shop describes eating it thawed, over rice
- The shop says thawing under running water takes 5 to 10 minutes, and that thawing naturally in the refrigerator is a guide of 2 to 3 hours
- Rakuten rating: 4.28 (577 reviews). Viewed October 26, 2026
Watch out for
- The shop’s best-before labeling is about 1 week in the freezer, and the same day once thawed. The shop advises eating it within 1 week of arrival
- The shop advises against thawing with heat, such as in a microwave
- We found no “生食用” (for eating without cooking) or “加熱用” (for cooking with heat) label for this product. What the shop describes is thawing it and putting it on rice as it is
Suits: Someone who wants to use it up one bowl-sized portion at a time, or who can plan to eat it within 1 week of arrival
The features are from the Rakuten Ichiba product page (viewed October 26, 2026). The rating is as shown on Rakuten (viewed October 26, 2026) and may not represent the product’s current condition.
Basic Information
- Product name
- Wild Tuna Zuke (Marinated Tuna) 5 Servings (110g × 5 Packs)
- Contents
- 110g (80g of tuna and 30g of sauce) × 5 packs. The shop describes each pack as one rice bowl (donburi) serving
- Storage / best-before date
- Arrives frozen. The shop’s labeling is about 1 week in the freezer, and the same day once thawed
- Thawing
- The shop describes thawing in the refrigerator (2 to 3 hours) or under running water (5 to 10 minutes). It advises against thawing with heat
- Ingredients
- 鉢鮪 (bigeye tuna; origin: Japan, Taiwan and others), soy sauce, sugar and others (the full text is in the details below)
- Allergen labeling
- The ingredients field states that it contains wheat and soybeans in part
- Condition / how to eat
- Frozen. The shop describes eating it thawed, over rice. No “生食用” (for eating without cooking) or “加熱用” (for cooking with heat) label is shown for this product
- Delivery
- Described as delivered by Yamato Transport (ヤマト運輸) Cool TA-Q-BIN (frozen)
- Noshi / gifts
- The listing has items for noshi (gift wrapping label) and message card support (the types of noshi inscription and the wrapping are Not confirmed)
- Seller
- 株式会社東日本貿易 (shop name まぐろ処 一条, Iwaki City, Fukushima Prefecture)
This list transcribes what is stated on the product page. However, the “Not confirmed” labels and any notes we add are our own.
The ingredients field states only that the product contains wheat and soybeans in part. We could not find any guidance on whether it contains other items. 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 26, 2026).
See the transcribed details, sources and “Not confirmed” items (16 items)
This list transcribes what is stated on the product page. However, the “Not confirmed” labels and any notes we add are our own.
- Product name
- Wild Tuna Zuke (Marinated Tuna) 5 Servings (110g × 5 Packs)The product name shown on the Rakuten Ichiba product page is a long string with many search terms. Only the product-name part is shown here.
- Contents
- 110g (80g of tuna and 30g of sauce) × 5 packs, 550g in total. The shop says each pack is one rice bowl (donburi) serving. The product name says 5 servingsSource: Rakuten Ichiba product page, product description and images in it (accessed October 26, 2026)
- Options
- There is no selection field for sizes or variations. This article covers 1 set (5 packs). The shop says that buying 2 sets together adds 2 packs. The conditions it describes are: 2 sets (10 packs) become 12 packs in total; orders shipped to multiple addresses, or orders with different delivery dates, are not eligible; and with 3 or more sets, at most 2 packs are addedSource: Rakuten Ichiba product page, images in the product description (accessed October 26, 2026)
- Storage method
- The shop describes shipping it frozen. Keeping it in the freezer is mentioned, but the storage temperature is Not confirmedSource: Rakuten Ichiba product page, product description
- Best-before date
- The shop’s labeling is about 1 week in the freezer, and the same day once thawed. An image in the product description says to eat it within 1 week of arrival. The delivery date can be specified, and the shop recommends specifying a date 1 to 2 days before you plan to eat it. The date printed on the item that arrives is Not confirmedSource: Rakuten Ichiba product page, product description and images in it (accessed October 26, 2026)
- Thawing method
- The product description gives two ways: thawing naturally in the refrigerator, or thawing under running water. An image in the description gives 2 to 3 hours for natural thawing in the refrigerator and 5 to 10 minutes under running water, and says the time varies with the season and water temperature. The shop advises against thawing with heat, such as in a microwave. We could not find any guidance on whether it can be refrozenSource: Rakuten Ichiba product page, product description and images in it (accessed October 26, 2026)
- After opening
- We could not find guidance on storage after opening, so it is Not confirmed. The best-before date row says the same day once thawedSource: Rakuten Ichiba product page, product description
- Ingredients
- Listed as 鉢鮪 (bigeye tuna; origin: Japan, Taiwan and others), soy sauce, fermented rice seasoning, sugar, seafood extract, fish sauce, brewed vinegar, kelp extract, yeast extract / thickener (modified starch). An image in the product description says it uses wild bigeye tuna (天然メバチマグロ)Source: Rakuten Ichiba product page, product description and images in it (accessed October 26, 2026)
- Allergen labeling
- The ingredients field states that it contains wheat and soybeans in part. We could not find guidance on other itemsSource: Rakuten Ichiba product page, ingredients field of the product description
- Origin of ingredients
- The “Origin” field says Japan, South Korea and others. In the ingredients field, the origin of the 鉢鮪 is given as Japan, Taiwan and others. The two fields are worded differently, and both are as the seller states themSource: Rakuten Ichiba product page, product description (accessed October 26, 2026)
- Place of processing
- Not confirmed (we could not find it on the product page)
- Condition / how to eat (cooking needed?)
- Arrives frozen, marinated in the sauce. The shop says it is already seasoned and needs no preparation, and describes eating it thawed, over rice. Variations such as yamakake (served with grated mountain yam), combining it with avocado, and as an otsumami (a small dish to go with drinks) are also described. We could not find a “生食用” (for eating without cooking) or “加熱用” (for cooking with heat) label for this product (the images in the product description include the words “冷凍マグロ（生食用）” (frozen tuna, for eating without cooking), but they are about the storage of frozen tuna in general)Source: Rakuten Ichiba product page, images in the product description (accessed October 26, 2026)
- Delivery
- Described as delivered by Yamato Transport (ヤマト運輸) Cool TA-Q-BIN (frozen), in a styrofoam box with cold packs. The shop says that because the sauce contains salt, it does not freeze easily, and the sauce may turn slushy during delivery, which it says does not affect quality. It advises checking the contents on arrival and putting it in the freezer promptlySource: Rakuten Ichiba product page, product description and images in it (accessed October 26, 2026)
- Manufacturer
- The seller is 株式会社東日本貿易 (shop name まぐろ処 一条, Iwaki City, Fukushima Prefecture). The name and address of the manufacturer / processor are Not confirmedSource: company profile and product description on Rakuten Ichiba (accessed October 26, 2026)
- Shop
- まぐろ処 一条 (Rakuten Ichiba)
- Noshi / gifts
- The Rakuten Ichiba product page has items for noshi (gift wrapping label) and message card support. The types of noshi inscription are Not confirmed. Guidance on wrapping is Not confirmed, and we could not find guidance on gift boxes. The shop says it ships in a styrofoam box. A delivery slip is described as not enclosedSource: Rakuten Ichiba product page, images in the product description (accessed October 26, 2026)
Prices are not listed here because they change. Please check the current price and stock availability at the link above.
What Public Reviews Say
We organized the Rakuten Ichiba product reviews by theme. The rating figures reflect the time of viewing and will change. The summary below covers only the reviews we read and may not reflect the product’s current condition.
| Site | Rating | Number of Reviews | Date Accessed |
|---|---|---|---|
| Rakuten customer reviews (product page) | 4.28 / 5 | 577 | October 26, 2026 |
Rating breakdown: 5★ 338 / 4★ 140 / 3★ 50 / 2★ 23 / 1★ 26 (as shown on Rakuten Ichiba, viewed October 26, 2026)
What we read: the first 60 reviews in Rakuten’s default order (posted July 2013 to June 2026; latest June 2026), plus 25 reviews filtered to 1★ (26 match; latest January 2026) and 23 filtered to 2★ (23 match; latest October 2026), 108 in total. We did not filter to 3★. The default-order 60 include older posts. These are trends within what we read and may not reflect the product’s current condition.
1★ and 2★ reviews total 49, about 8% of all reviews. The points under “What Reviewers Note” are trends among the 48 reviews we read after filtering to these two ratings. The counts are approximate, based on reading the review texts, so we use broad terms such as “many” and “several”. Posts only about delivery or the shop’s service are not included.
What Reviewers Praise
Satisfaction with the sauce and taste
Praise for the taste, such as the sauce being well absorbed or the dish going well with rice, appeared in many of the 60 reviews in the default order.
Easy to thaw and convenient
Several of the 60 reviews in the default order said it thaws in a short time under running water, or that you only need to put it on rice.
A good amount
Several of the 60 reviews in the default order said that 110g makes one rice bowl, or that it is enough even for a man.
Gifts and sending to parents
Several of the 60 reviews in the default order said they sent it to their parents for Mother’s Day or Father’s Day, or that it is good because it can be eaten without using fire. Most are from the last 2 years (as described by the reviewers).
Source: Rakuten customer reviews (accessed October 26, 2026)
What Reviewers Note
Strong or salty flavor
Several of the 48 reviews rated 1★ or 2★ said the sauce is on the strong side or salty. However, only a few of them are from the last 2 years.
A fishy smell
Several of the 48 reviews rated 1★ or 2★ said they noticed a fishy smell. These include posts from the last 2 years.
How to check: the ways of eating that the shop describes are in the “Condition / how to eat” row of the “Basic Information” section of this article.
A dark color, different from the photo
Several of the 48 reviews rated 1★ or 2★ said the color is dark and differs from the impression given by the product photos. We could not find an explanation of the color from the shop.
A short best-before date
Several of the reviews we read said the best-before date of about 1 week is short, or that depending on when it arrives, the days available to finish it are limited.
How to check: the shop’s best-before labeling and its delivery-date guidance are in the “Best-before date” row of the details in the “Basic Information” section of this article.
Source: Rakuten customer reviews (accessed October 26, 2026)
Summary: Is This the One for You?
Deciding factor: You want individually portioned packs, one bowl at a time, that you can thaw and simply put on rice, and you can plan to eat it all within 1 week of arrival. If these two are your conditions, this product fits: it comes as 5 packs of 110g, arrives by Cool TA-Q-BIN (frozen), and the shop describes each pack as one rice bowl serving (weak point: the shop’s best-before labeling is about 1 week in the freezer, which is short).
- The shop describes each pack as one rice bowl serving. In the reviews, several of the 60 in the default order mentioned how easy it is to thaw and the amount
- The Rakuten rating is 4.28/5 (577 reviews). Within what we read, the points raised were strong or salty flavor, a fishy smell, the color, and a short best-before date
Other options: If you want one whose shop labeling is about 1 month in the freezer, the same shop has まぐろ処一条 Coarsely Minced Wild Tuna Negitoro 200g (100g × 2 Packs). If you want a seafood bowl topped with sea urchin and ikura, it has まぐろ処一条 Uni Ikura Don for 4 Bowls (Sea Urchin 100g × 2, Ikura in Soy Sauce 70g × 2).
This section is based on the Rakuten Ichiba product page and Rakuten customer reviews (accessed October 26, 2026). These are trends within the reviews we read and may not reflect the product’s current condition.
Prices, stock, shipping fees, and delivery dates are subject to change. The information in this article was gathered on October 26, 2026. Please be sure to check the listing at the link before purchasing.
This article contains affiliate links (advertising). Editorial Policy
This article summarizes information publicly available on retail sites and review sites. Product details such as amount, storage method, and ingredients are subject to change. Please check the seller’s listing for the most current information.
Assessments of taste and quality are summarized from third-party posts with sources cited, and do not represent Ochinity’s own evaluation. Our editorial process is described in the Editorial Policy.
Information as of: October 26, 2026 / Sources: Rakuten Ichiba product page, Rakuten customer reviews, Consumer Affairs Agency “About Allergen Labeling”
