This is the 特上博多ふくいち粒々辛子明太子1kg (karashi mentaiko, chili-seasoned pollock roe) that 株式会社八一 of Tomisato City, Chiba Prefecture sells at its Rakuten Ichiba shop 築地丸中 (country of origin of the raw materials and place of processing: not confirmed). It arrives frozen, and the ingredients include colorants and a color fixative. Based on the product page and Rakuten reviews, this article organizes the amount, shelf life, ingredients, suitability as a gift and reviews. Its features are that it is a 1kg pack the product description calls 1本物 (ipponmono), and that the page advises thawing in the refrigerator and portioning it while half-thawed.
At a Glance
Key points
- 1kg in total, and the product description calls it 1本物 (ipponmono). Among the 11 mentaiko and tarako items featured on Ochinity (as of October 29, 2026), comparing the shapes of the 6 items that total 1kg, the ones that can be identified as ipponmono are this product and Kanefuku’s ipponmono 3L, 2 items in all (weak point: the product description carries a note that skins may be torn and sizes may vary)
- 60 days frozen, 3 days refrigerated. This is the best-before date shown on the product page. The page advises thawing in the refrigerator and portioning while half-thawed
- Rakuten rating 4.56 (310 reviews). As viewed on October 29, 2026. The fewer the reviews, the more easily the figure moves
- Noshi (gift wrapping label) and gift wrapping are mentioned on the page. The types of inscription and whether a gift box is included are not confirmed
Watch out for
- The ingredients include colorants (Red No. 102, Yellow No. 5, Red No. 3) and a color fixative (sodium nitrite). It is not an uncolored (無着色) product. Wheat and soybeans are listed as allergens
- In the reviews, some mention a watery texture after thawing and weak grain feel (among the 71 we read, about 8 on wateriness and about 8 on grain feel)
Suits: people who want a 1kg ipponmono that they can portion out and use from the freezer
The comparison covers the 11 mentaiko and tarako items featured on Ochinity (as of October 29, 2026). Each value is as of the date its own article was researched and may differ from the current listing. The features are from the Rakuten Ichiba product page (viewed October 29, 2026). The rating is as shown on Rakuten (viewed October 29, 2026) and may not reflect the product’s current condition.
Compared with 11 Similar Mentaiko and Tarako Items
The 11 mentaiko and tarako items featured on Ochinity (as of October 29, 2026). Each value is as of the date its own article was researched and may differ from the current listing. The shapes differ (kireko (pieces that have broken apart), ipponmono and so on), and the size of a single piece also differs by product, so the number of grams cannot tell you how much roe you actually get. Ratings are Rakuten’s aggregate figures. The review trends are within what we read and may not reflect the product’s current condition. The table is in Japanese syllabary (gojūon) order of the product names.
| Product | Shape | Total amount | Rakuten rating |
|---|---|---|---|
| 魚耕 訳あり 辛子明太子 (“wakeari” (imperfect/irregular, sold at a discount) karashi mentaiko) | Kireko / bara-ko | 1000g | 4.531429 reviews |
| かねふく ふとっぱら明太子 (Futoppara mentaiko) | Ipponmono (3 to 4 pieces × 2 bags) | 700g | 4.75296 reviews |
| かねふく 明太子（一本物3L） (ipponmono 3L mentaiko) | Ipponmono | 1000g | 4.6175 reviews |
| かねふく 訳あり明太子（並切） (mentaiko, namikiri) | Namikiri | 2000g | 4.7166 reviews |
| 甲羅組 訳あり 無着色 博多辛子明太子 (uncolored Hakata karashi mentaiko) | Kireko / bara-ko | 1000g | 4.435966 reviews |
| 築地丸中 特上博多ふくいち粒々辛子明太子This article | Ipponmono | 1000g | 4.56310 reviews |
| 博多あごおとし 辛子明太子 (Hakata agoototoshi karashi mentaiko) | Ipponmono | 500g | 4.551619 reviews |
| まかない明太子 (makanai mentaiko) | Makanai mentaiko (1 pack) | 230g | 4.652177 reviews |
| ますよね 訳あり 無着色 辛子明太子 (uncolored karashi mentaiko) | Kireko / bara-ko | 1000g | 4.53413 reviews |
| 無着色 辛子明太子 小切れ (uncolored karashi mentaiko, kogire) | Kogire | 1000g | 4.592604 reviews |
| 無添加たらこ 切れ子 (additive-free tarako, kireko) | Kireko (tarako) | 600g (200g × 3) | 4.72410 reviews |
You can go to each product’s article from its name. The ratings were viewed on each article’s information-as-of date; this article’s value is as of October 29, 2026. The reviews of this article are the 71 Rakuten reviews we read, and the trends may not reflect the product’s current condition.
- Of the 6 items that total 1kg, the ones identified as ipponmono are this product and Kanefuku’s ipponmono 3L, 2 items. The other 4 are kireko, bara-ko or kogire
- Whether colorants are used also differs by product. This product uses 3 colorants and a color fixative. If you are looking for an uncolored 1kg ipponmono, Kanefuku’s ipponmono 3L carries 無着色 (uncolored) in its product name
Basic Information
- Product Name
- 築地丸中 特上博多ふくいち粒々辛子明太子1kg
- Seller
- 株式会社八一 (Tomisato City, Chiba Prefecture) / Rakuten Ichiba shop 築地丸中
- Amount
- 1kg (several whole roe pieces (一腹))
- Storage
- Store at −18°C. The best-before date is 60 days frozen and 3 days refrigerated
- Ingredient Notes
- Contains colorants (Red No. 102, Yellow No. 5, Red No. 3) and a color fixative (sodium nitrite). Contains wheat and soybeans
- Country of Origin (Raw Materials)
- not confirmed
- Shipping
- Frozen cool delivery (クール冷凍便) (as written in the shop notice on Rakuten Ichiba)
- Noshi / Gift
- Noshi (gift wrapping label) and gift wrapping are mentioned (types of inscription: not confirmed)
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 list wheat and soybeans. If you have an allergy, please ask the seller before buying, or be sure to check the label on the product once it arrives (reference: Consumer Affairs Agency, Japan, “About Allergen Labeling”, accessed October 29, 2026).
See the transcribed details, sources and “not confirmed” items (17 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
- 築地丸中 特上博多ふくいち粒々辛子明太子1kgThe product name shown on the Rakuten page is a long one followed by terms such as oseibo (year-end gift) and o-toshiga (New Year’s greeting). Only the product-name part is shown here.
- Amount
- 1kg. The number of servings is not stated (not confirmed). The product description carries a note that it contains several pieces of 1本物 (ipponmono), and that the photo and the number of pieces may differSource: Rakuten Ichiba product page (viewed October 29, 2026)
- Options
- There are no specification options; it is a single 1kg typeSource: Rakuten Ichiba product page, option field (viewed October 29, 2026)
- Storage Method
- The page says to store at −18°CSource: Rakuten Ichiba product page, product specifications
- Best-Before Date
- The page says 60 days frozen (−18°C or below) and 3 days refrigerated (10°C or below). Whether the count starts from the manufacturing date or the shipping date is not confirmedSource: Rakuten Ichiba product page, product specifications
- Thawing Method
- The page advises thawing it in the refrigerator (10°C or below) without fail and portioning it while half-thawed. It also says it cannot be thawed at room temperature or in a hot-water bath, and cannot be refrozen. After thawing, it says to eat it as soon as possible and that moisture (written as “トリップ” in the listing) may come outSource: Rakuten Ichiba product page, product description
- Cautions After Opening
- The page says to eat it as soon as possible after thawing. Other cautions after opening are not confirmedSource: Rakuten Ichiba product page, product description
- Ingredients
- walleye pollock ovaries, fermented seasoning, salt, chili pepper, bonito-flavored seasoning / seasoning (amino acids, etc.), sweetener (sorbitol), antioxidant (vitamin C), niacin, enzyme, colorants (Red No. 102, Yellow No. 5, Red No. 3), color fixative (sodium nitrite), (contains wheat and soybeans as part of the ingredients)Source: Rakuten Ichiba product page, product specifications
- Allergens
- The allergens listed are wheat and soybeans. We found no inconsistency in the allergen labeling within the product pageSource: Rakuten Ichiba product page (viewed October 29, 2026)
- Nutrition
- Per 100g (estimated values): energy 104kcal, protein 18.6g, fat 1.5g, carbohydrates 4.0g, salt equivalent 4.8gSource: Rakuten Ichiba product page, product specifications
- Country of Origin (Raw Materials)
- We found no statement of where the walleye pollock roe comes from, so it is not confirmedSource: Rakuten Ichiba product page (viewed October 29, 2026)
- Place of Processing
- not confirmed. The manufacturer’s address is stated, but we found no statement of it as the place of processingSource: Rakuten Ichiba product page
- Condition / How to Eat (Heating Required?)
- The thawed/raw field says raw, and it arrives frozen. We found no guidance on whether heating is needed or whether it can be eaten rawSource: Rakuten Ichiba product page, product specifications
- Shipping
- The shop notice says “クール冷凍便” (frozen cool delivery), and the product page says “クール便” (cool delivery). The product page says that leaving the package at the door (okihai) is not available. Whether you can specify a delivery date is not confirmedSource: Rakuten Ichiba shop notice and product page (viewed October 29, 2026)
- Shipping Timing
- The shop notice says it ships within 2 business days: after payment is confirmed for prepaid payment methods, and after the order is confirmed for all others (such as credit cards). The product page, on the other hand, says it ships as soon as possible after the order, within 1 to 3 days, so the two differ. There is no shipping on Sundays, public holidays and market holidaysSource: Rakuten Ichiba shop notice (viewed October 29, 2026) and product page (same date)
- Manufacturer
- The manufacturer field in the product description gives 株式会社ふくいち (Higashi-ku, Fukuoka City, Fukuoka Prefecture). On the other hand, an image in the product description shows the name 株式会社シーフードなた as an affiliated maker with the same manufacturing process. Which one manufactures it is not confirmedSource: Rakuten Ichiba product page, product specifications and product description image
- Noshi / Gift
- The product description says it is also recommended as a gift. The page mentions attaching noshi (gift wrapping label), to be requested in the message field. The types of inscription are not confirmed. The page mentions gift wrapping, shown as an item in the option field. Whether a gift box is included is not confirmed. The page says a delivery slip and an itemized statement are not enclosedSource: Rakuten Ichiba product page (viewed October 29, 2026)
- Shop
- 築地丸中 on Rakuten Ichiba (seller: 株式会社八一, Tomisato City, Chiba Prefecture)Source: Rakuten Ichiba shop company profile
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. Rating figures are as of viewing and change afterward. The following are trends within what we read and may not reflect the product’s current condition.
| Site | Rating | Reviews | Viewed |
|---|---|---|---|
| Rakuten customer reviews (product page) | 4.56 / 5 | 310 | October 29, 2026 |
Rating breakdown: 5★ 217 / 4★ 68 / 3★ 12 / 2★ 7 / 1★ 6 (as shown on Rakuten Ichiba, viewed October 29, 2026)
What we read: 58 reviews in the standard order (Rakuten’s default order; no name for the sort order is displayed) (posted November 2025 to October 2026; latest October 2026), all 6 reviews at 1★ (posted August 2020 to February 2026) and all 7 reviews at 2★ (posted July 2020 to January 2026), 71 in total. We did not read the 3★ to 5★ filters. These are trends within what we read and may not reflect the product’s current condition.
The counts below are approximate figures from reading the text, and do not include reviews that were only about delivery or shop service. For the points of concern, low-rated reviews are also counted.
What Reviewers Praise
Satisfaction with the amount and appearance (about 12 of the 58 in the standard order)
About 12 of the 58 reviews in the standard order said they were satisfied that the amount is large or that it looks attractive. Some also describe it as small in size but plentiful in amount.
Mild spiciness (about 9)
About 9 of the 58 reviews in the standard order said it is not too spicy, is mild, or has just the right level of spiciness. One review said it is a little spicy, and one said it is pleasantly spicy and satisfying.
Shape and size of each whole piece (一腹) (about 13)
About 13 of the 58 reviews in the standard order said the shape of each whole roe piece (一腹) is neat or the size is easy to use. Of these, 4 describe it as small.
Well received as a gift (about 10)
About 10 of the 58 reviews in the standard order said they sent it as an oseibo (year-end gift), an ochugen (mid-year gift), a Father’s Day gift or similar and that the recipient was pleased. On the other hand, one review said it may not suit formal gifts.
Source: Rakuten customer reviews (viewed October 29, 2026)
What Reviewers Note
Watery after thawing (about 8 of the 71 we read)
About 8 of the 71 reviews we read said it is watery after thawing, sticky, lets out liquid, or seems to melt (3 at 1★, 4 at 2★ and 1 at 4★ in the standard order). Of these, 4 were posted on or after October 29, 2024.
How to check: The shop’s thawing instructions are summarized in the “Thawing Method” row of this article’s Basic Information.
Weak grain feel / small grains (about 8)
About 8 of the 71 reviews we read said the popping feel of the grains is weak or the grains are small (2 at 1★, 4 at 2★ and 2 at 4★ in the standard order). Of these, 3 were posted on or after October 29, 2024.
Salty / strong flavor (3)
3 reviews, counting 1★ and 2★ together, said it is salty or the flavor is strong.
How to check: The salt equivalent in the nutrition information is in the “Nutrition” row of this article’s Basic Information.
Source: Rakuten customer reviews (viewed October 29, 2026)
Summary: Is This the One for You?
Why choose it: You want a 1kg ipponmono, and you want to portion it out and use it from the freezer. If these two are your conditions, this product is one of the 2 items that total 1kg and can be identified as ipponmono among the 11 mentaiko and tarako items featured on Ochinity (as of October 29, 2026) (the other is Kanefuku’s ipponmono 3L). Weak point of this product: it uses colorants and a color fixative.
- According to the product page, the best-before date is 60 days frozen and 3 days refrigerated. The page advises thawing in the refrigerator and portioning while half-thawed
- The Rakuten rating is 4.56 / 5 (310 reviews). Among the 71 we read, some mentioned mild spiciness (about 9) and the shape and size of each whole piece (about 13)
- Some reviews note wateriness after thawing (about 8) and grain feel (about 8). The page says it cannot be refrozen
Other options: If you want a 1kg ipponmono without colorants, there is かねふく 明太子（一本物3L）; if irregular shapes are fine, there is 魚耕 訳あり 辛子明太子（kireko / bara-ko）.
This section is based on the Rakuten Ichiba product page and Rakuten customer reviews (viewed October 29, 2026). The review trends are within what we read and may not reflect 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 29, 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 sales sites and review sites. Product information 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 29, 2026 / Sources: Rakuten Ichiba 築地丸中 product page, Rakuten customer reviews, Consumer Affairs Agency, Japan, “About Allergen Labeling”
