The “高級 大納言 つぶあん 800g” (Dainagon Tsubuan, 800 g) from the shop 宮地館 (Rakuten Ichiba) is a single-size, 800 g tsubuan (coarse red bean paste with whole beans left in), whose ingredient list shows three items: dainagon azuki beans (a large variety of red bean, from Hokkaido), sugar (from Okinawa Prefecture) and salt (from Fukuoka Prefecture). The best-before date is given as 30 days, and delivery is described as mail delivery (dropped into the mailbox). We organized what the Rakuten product page and reviews say into five points: quantity, shelf life, ingredient labeling, suitability as a gift and reviews. The features we could confirm on the product page are three: there are only three ingredients, storage guidance runs from room temperature to refrigerated and frozen, and examples of uses are given. Whether it needs heating, the allergen labeling and the shelf life after opening are not stated on the product page: not confirmed.
At a Glance
Key points
- Three ingredients: dainagon azuki beans (from Hokkaido), sugar (from Okinawa Prefecture) and salt (from Fukuoka Prefecture). This is what the ingredient-list field of the product page says
- One size only: 800 g. The product page shows no field for choosing a size or the like. Delivery is described as mail delivery (dropped into the mailbox)
- The best-before date is given as 30 days. The page says it can be kept at room temperature, but advises refrigerating it after it arrives, and says it can also be frozen
- Rakuten rating 4.79 (1,600 reviews). Viewed November 4, 2026
Watch out for
- The best-before date is given as 30 days. We did not find the shelf life after opening, or guidance on whether it can be eaten as it is, on the product page: not confirmed
Suits: People who want chunky tsubuan with the texture of dainagon azuki beans, in an 800 g amount. Because freezing is described as possible, people who want to divide it into portions and use it a little at a time
The features are from the Rakuten Ichiba product page (viewed November 4, 2026). The rating is Rakuten Ichiba’s display (viewed the same day) and does not necessarily reflect the current state of the product.
Basic Information
- Product name
- 高級 大納言 つぶあん 800g (Dainagon Tsubuan, 800 g)
- Quantity
- 800 g (one size)
- Ingredients
- Dainagon azuki beans (from Hokkaido), sugar (from Okinawa Prefecture), salt (from Fukuoka Prefecture)
- Best-before date
- Given as 30 days (starting point: Not confirmed)
- Storage
- It can be kept at room temperature, but refrigeration after arrival is advised. Freezing is also described as possible
- Allergen labeling
- Not confirmed
- Delivery
- Mail delivery (dropped into the mailbox). The page says it ships within 1 business day of the order
- Noshi / Gift
- The product name carries the label “のし対応” (noshi supported) (types of noshi inscription and wrapping: 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.
No allergen labeling appears on the product page. If you have an allergy, ask the shop before buying, or be sure to check the label on the product when it arrives (reference: Consumer Affairs Agency, Japan, “About Allergen Labeling”, viewed November 4, 2026).
See the transcribed details, sources and “not confirmed” items (15 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
- 高級 大納言 つぶあん 800g (Dainagon Tsubuan, 800 g)The product name shown on the Rakuten Ichiba product page is a long string with many search keywords. Only the product-name part is shown here.
- Type of food
- Tsubuan (coarse red bean paste)Source: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- Quantity
- 800 g. The number of servings is not stated: Not confirmedSource: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- Available options
- No field for choosing a size or the like appears on the product page; it is a single 800 g sizeSource: Rakuten Ichiba product page (viewed November 4, 2026)
- Storage method
- It can be kept at room temperature, but refrigeration after arrival is advised. The product description also says to avoid direct sunlight, high temperatures and humidity, and that it can be frozenSource: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- Best-before date
- 30 days. The page does not say whether it counts from shipping or from arrival, so the starting point is Not confirmedSource: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- How to thaw
- Freezing is described as possible. The thawing steps: Not confirmedSource: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- After opening
- The shelf life after opening and any precautions are not stated on the product page: Not confirmed
- Origin of ingredients
- The ingredient-list field gives dainagon azuki beans (from Hokkaido), sugar (from Okinawa Prefecture) and salt (from Fukuoka Prefecture). The catch copy and the product description say that dainagon azuki beans from Tokachi, Hokkaido are usedSource: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- Place of processing
- Not confirmed. The product description says it is all made in a workshop in Japan, but the location of the workshop is not stated. The catch copy says it is handmade and cooked over an open flame in a copper kettleSource: Rakuten Ichiba product page (viewed November 4, 2026)
- Condition / how to eat (whether heating is needed)
- No guidance on whether heating is needed, or on whether it can be eaten as it is, was found on the product page. Listed examples of use are putting it on toast and using it as the filling of manju (steamed buns with a sweet filling) and daifuku (soft rice cakes with a sweet filling)Source: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- Delivery
- Mail delivery (dropped into the mailbox). The page says it ships within 1 business day of the orderSource: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- Noshi / Gift
- The product name carries the label “のし対応” (noshi supported). Fields for noshi support, name on the noshi, wrapping and a message card cannot be read from the product page, and the types of inscription and the wrapping are Not confirmed. The page says it arrives by mail delivery (dropped into the mailbox)Source: Rakuten Ichiba product page (viewed November 4, 2026)
- Manufacturer
- The seller is given as 宮地館 (2-1 Miyajimotomachi, Fukutsu City, Fukuoka Prefecture). No separate manufacturer is stated: Not confirmedSource: product description field of the Rakuten Ichiba product page (viewed November 4, 2026)
- Shop
- 宮地館 (Rakuten Ichiba)
Prices, stock, shipping fees and order availability may change. Please check the latest information at the link above.
What Public Reviews Say
We organized the product reviews on Rakuten Ichiba by theme. The rating figures are as of the viewing date and will change afterward. The following are trends within what we read and do not necessarily reflect the current state of the product.
| Site | Rating | Reviews | Viewed |
|---|---|---|---|
| Rakuten customer reviews (product page) | 4.79 / 5 | 1,600 | November 4, 2026 |
Rating breakdown: 5★ 1,356 / 4★ 188 / 3★ 37 / 2★ 8 / 1★ 11 (as shown on Rakuten Ichiba, viewed November 4, 2026)
What we read: the first 60 reviews in the default order (posted November 2025 to November 2026; latest November 2026), plus all 11 filtered to 1★ (posted December 2021 to November 2025) and all 8 filtered to 2★ (posted July 2021 to May 2025), 79 in total. Of the 1★ and 2★ reviews, one each was posted within the last two years. 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 exclude posts that only describe delivery delays or the shop’s handling.
What Reviewers Praise
Mild, refined sweetness (about 22 of 60)
About 22 of the first 60 reviews in the default order described the sweetness as mild, moderate or refined. One post says the reviewer was not very fond of red bean paste before but came to appreciate its refinement (the reviewer’s own words).
The texture of the dainagon beans (about 13)
About 13 of the first 60 reviews in the default order said the azuki beans are large, or that the bean texture remains firmly.
A wide range of uses (about 12 of 60 for zenzai, ohagi and similar; about 10 for bread, toast and similar)
About 12 posts said they used it for Japanese sweets such as zenzai (sweet red bean soup) and ohagi (rice balls coated with sweet red bean paste), and about 10 said they used it on bread or toast, or with butter on bread (the reviewers’ own words).
Dividing and freezing it to use it all (7)
Seven of the first 60 reviews in the default order said they cut the part they could not use within the best-before date into portions and froze it. The product page also says freezing is possible.
Source: Rakuten customer reviews (viewed November 4, 2026)
What Reviewers Point Out
Opinions on sweetness differ (2)
Two of the first 60 reviews in the default order said it tasted too sweet. About 22 posts took it as mild, so impressions vary.
The best-before date is short (2)
Two of the first 60 reviews in the default order said the best-before date is short.
How to check: the best-before date and storage are summarized in the “Best-before date” and “Storage” rows of “Basic Information” in this article.
Texture or flavor differed from expectations (4 of 19 reviews at 1★ and 2★)
Of all 19 reviews at 1★ and 2★, 4 included remarks along the lines of the texture or flavor differing from what the reviewer expected. What they described differed from post to post: a hard skin, a burnt-like flavor, stickiness and a weak azuki flavor. These were posted from July 2022 to November 2025, and one of them within the last two years.
Source: Rakuten customer reviews (viewed November 4, 2026)
Summary: Is This the One for You?
Why choose it: You want tsubuan whose ingredient list shows only azuki beans, sugar and salt, and you want to freeze 800 g and use it in portions. If these two are your conditions, this product (800 g, one size) fits. The weak points are that the best-before date is 30 days and that there is no guidance on whether it can be eaten as it is or on the shelf life after opening.
- The ingredient-list field has three items: dainagon azuki beans (from Hokkaido), sugar (from Okinawa Prefecture) and salt (from Fukuoka Prefecture), and no allergen labeling appears on the product page
- Room-temperature storage is possible, refrigeration after arrival is advised, and freezing is also described as possible. Among the reviews we read, 7 of the first 60 in the default order said they cut it into portions and froze it to use it all
- The Rakuten rating is 4.79 / 5 (1,600 reviews). Among the first 60, about 22 posts described the sweetness as mild and about 13 mentioned the bean texture
This section is based on the Rakuten Ichiba product page and Rakuten customer reviews (viewed November 4, 2026). The reviews are trends within what we read and do not necessarily reflect the current state of the product.
Prices, stock, shipping fees, and order availability are subject to change. This article’s information-as-of date is November 4, 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 published on the Rakuten Ichiba product page and review sites. Product information such as amount, storage method and ingredients may change. Please check the product page 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: November 4, 2026 / Sources: Rakuten Ichiba “宮地館” product page, Rakuten customer reviews, Consumer Affairs Agency, Japan, “About Allergen Labeling”
