For Kawamotoya Chaho (川本屋茶舗)’s gateau au chocolat (the product name is “Homemade Rich Gateau au Chocolat, Whole Size (about 18cm)” (自家製 濃厚ガトーショコラ ホールサイズ（約18cm）)), a whole cake is hard to judge: how many people can finish it, and how long it keeps, are unclear. In this article, we organized what the Rakuten Ichiba product page states and what Rakuten customer reviews say into five points: amount, shelf life, ingredient labeling, suitability as a gift, and reviews.
What We Confirmed
- Amount and number of servings
- Storage and shelf life
- Ingredients and allergen labeling
- Whether it works as a gift
- Trends in the 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 | Homemade Rich Gateau au Chocolat, Whole Size (about 18cm) (自家製 濃厚ガトーショコラ ホールサイズ（約18cm）)Source: Rakuten Ichiba product page (accessed October 2, 2026) |
|---|---|
| Name | Gateau au chocolat (chocolate cake)Source: product description on the Rakuten Ichiba product page |
| Amount | 1 whole cake (about 18cm). Size: about 7cm wide, about 18cm deep, and about 4cm high. Weight (g): Not confirmedSource: product description and the guide image on the Rakuten Ichiba product page (accessed October 2, 2026) |
| Storage | Keep in a cool place at 25°C or below, away from direct sunlight and high temperature and humidity. The page recommends refrigerator storageSource: product description on the Rakuten Ichiba product page (accessed October 2, 2026) |
| Best-Before Date | About 2 weeks from the shipping date. The number of days it keeps after opening is Not confirmed (the page only advises eating it soon)Source: product description on the Rakuten Ichiba product page (accessed October 2, 2026) |
| Country of Origin of Ingredients | Not confirmed |
| Place of Processing | Not confirmed |
| Condition / How to Eat (Whether Heating Is Needed) | We found no explicit statement on whether heating is needed. The guide image on the product page gives instructions for eating it warm (about 50 seconds in a 500W microwave) and for eating it chilled (about 1 hour in the refrigerator)Source: guide image on the Rakuten Ichiba product page (accessed October 2, 2026) |
| Delivery | The page states that it ships by cool delivery (クール便) from June to September (a rough guide for the season; it may vary with the weather). Items whose temperature range differs from chilled-delivery items cannot be shipped together and may be sent as a separate shipmentSource: product description and the guide image on the Rakuten Ichiba product page (accessed October 2, 2026) |
| Manufacturer | Not confirmed (the page says it is handmade in the shop, but we could not confirm the manufacturer or its address) |
| Shop | 創業明治年間 お茶の老舗 川本屋 (Kawamotoya Chaho, Rakuten Ichiba) |
Prices are not listed here because they change. Please check the current price and stock availability at the link above. The page states that, because each one is handmade, there is some variation in size and shape.
Ingredients and Allergen Labeling
Within what we could check, the ingredients field of the product page is a heading only with nothing under it, and we found no ingredient names, additives, or allergen labeling. This item is not confirmed.
If you have an allergy, or want to check the ingredients and additives used, ask the shop before buying or check the food information label on the product when it arrives.
Reference: Consumer Affairs Agency, Japan, “About Allergen Labeling” (accessed October 2, 2026)
Five Things to Check Before Buying
| Point to Check | For This Product | Basis |
|---|---|---|
| 1. Amount / Servings | 1 whole cake (about 18cm). Weight (g) and number of servings: Not confirmed | Product description and guide image on the product page |
| 2. Storage and Shelf Life | Keep in a cool place at 25°C or below (the page recommends refrigerator storage). Best-before: about 2 weeks from the shipping date | Product description on the product page |
| 3. Ingredients and Allergen Labeling | Not confirmed (not stated on the page) | Checked on the Rakuten Ichiba product page |
| 4. Suitable as a Gift? | Comes in a gift box, according to the page. We could not confirm noshi or message cards | Product description and guide image on the product page |
| 5. What Reviews Say | The Rakuten Ichiba rating is 4.59 out of 5 (177 reviews). The following trends come from 80 reviews: the first 60 in Rakuten’s default order (posted September 2012 to August 2026; latest August 2026) combined with some of the 1★ to 3★ reviews. They may not reflect the product’s current condition. Many reviewers praise the richness, moistness, and modest sweetness, while a few mention texture, how rich or sweet it felt, and price. Posts about other products are excluded from the counts | Rakuten customer reviews (accessed October 2, 2026) |
Suitable as a Gift?
The following is what we could confirm on the product page and the guide images on it (accessed October 2, 2026).
- Packaging: The page states that it comes in a Kawamotoya original gift box. It also states that the type of box and the wrapping (wrapping paper, stickers, etc.) may change
- Wrapping: The page states that seasonal wrapping is available (the image is an example, and it may differ by product). It states that you can choose not to receive the original hand-carry bag
- Noshi (gift wrapping label): The product description mentions noshi, but the information did not match other displays on the product page, so this article does not say whether it is available. Please check the product page before buying
- Message cards and name printing: We could not confirm these
- Delivery: The page states that it ships by cool delivery (クール便) from June to September. Items that cannot be shipped together with chilled-delivery items may be sent as a separate shipment
The product name and description list occasions such as return gifts (uchi-iwai), birthdays, Valentine’s Day, Mother’s Day, and Father’s Day. Among the reviews we read, some posts said they used it as a gift for a mother’s birthday or for Valentine’s Day (source: Rakuten customer reviews, accessed October 2, 2026).
What Public Reviews Say
We organized the Rakuten Ichiba product reviews by theme. The rating figures are as of when we viewed them and change afterward. Posts about the shop’s other products or other variants are not counted.
| Site | Rating | Reviews | Viewed On |
|---|---|---|---|
| Rakuten customer reviews (product page) | 4.59 / 5 | 177 | October 2, 2026 |
Rating breakdown: 5★ 131 / 4★ 26 / 3★ 16 / 2★ 2 / 1★ 2 (as shown on Rakuten Ichiba, viewed October 2, 2026)
What we read: the first 60 reviews in Rakuten’s default order (posted September 2012 to August 2026; latest August 2026), plus 2 each filtered to 1★ and 2★ (all of them; posted April 2016 to February 2024), and 16 at 3★ added because 1★ and 2★ are few (all of them; posted February 2012 to February 2025), 80 in total. These are trends within what we read and may not reflect the product’s current condition.
What Reviewers Praise
Richness and a substantial weight
Of the 60 reviews in the default order, 24 mentioned the depth of the chocolate or the substantial weight when held (3 of them posted within the last 2 years). Some describe it as rich without being too heavy.
Moist texture and mouthfeel
19 of the 60 reviews mentioned the moistness of the cake or how it melts in the mouth (3 within the last 2 years). One post says the texture changed when it was warmed slightly.
Modest sweetness
17 of the 60 reviews said it is not too sweet or not heavy (2 within the last 2 years). These include a comment that it was easy to eat even for family members who do not usually eat sweets.
Wanting to buy again / repeat orders
22 of the 60 reviews said they order repeatedly or want to buy again (5 within the last 2 years). Some write that they choose it every year around Valentine’s Day and the like, or use it both as a gift and for themselves.
Source: Rakuten customer reviews (accessed October 2, 2026)
What Reviewers Note
Because 1★ and 2★ together are only 4 reviews, the base is the 20 reviews made up of those plus the 16 at 3★.
Texture (hard or dry)
3 of the 20 reviews at 1★ to 3★ said the texture was hard, dry, or not to their liking. All were posted in 2016 to 2017, and we found none among posts within the last 2 years.
How to check: the guidance for eating it warm or chilled is collected in the “Condition / How to Eat (Whether Heating Is Needed)” row of “Basic Information” in this article.
How rich or sweet it felt
Impressions are split in two. 4 reviews, among the 60 in the default order and the 16 at 3★, said it was too rich or sweet (0 within the last 2 years), and 3 of the 20 reviews at 1★ to 3★ said it was not as rich as expected or lacked a melting quality (1 within the last 2 years). Reviewers with different tastes are lined up on the same point.
Price
2 of the 60 reviews in the default order mentioned price (both posted in 2019). Posts that mentioned price but said they were satisfied are not counted here. Prices change, so this article does not list one.
Source: Rakuten customer reviews (accessed October 2, 2026)
Who It Suits / Who Should Be Careful
Who It Suits
- You want a whole gateau au chocolat (about 18cm) that you can cut up yourself
- You are interested in the shop’s guidance that it can be eaten warm or chilled
- You can finish it within the best-before period of about 2 weeks from the shipping date
Who Should Be Careful
- You have an allergy (the labeling is not confirmed, so please ask the shop)
- You want to use it as a formal gift with noshi or a message card (we could not confirm these)
- You have clear preferences for richness or texture (reviewers’ impressions are split)
- You mind some variation in size and shape
Prices, stock, shipping fees, and delivery dates are subject to change. This article’s information-as-of date is October 2, 2026. Please be sure to check the listing at the link before purchasing.
This article contains affiliate links (advertising). Editorial Policy
Summary
- It is a whole cake (about 18cm). Weight (g) and number of servings could not be confirmed. The best-before date is about 2 weeks from the shipping date
- Ingredient and allergen labeling and noshi availability could not be confirmed. If you need them, check with the shop before buying
- Many reviews praise the richness, moistness, and modest sweetness. Impressions of texture and richness vary from person to person
Related Pages
This article organizes information published on each sales site and review site. 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 2, 2026 / Sources: Rakuten Ichiba “川本屋茶舗” product page, Rakuten customer reviews, Consumer Affairs Agency, Japan, “About Allergen Labeling”
Comments