ralleru
Finding "I can eat this",together.
Reading every ingredient label in the supermarket, with a child who has allergies.
This is a place to share a little of that daily work.
STORY
Why ralleru exists
I am a single father raising two children. Both have severe allergies to egg and dairy.
The hard part at the supermarket is processed food, seasonings and frozen food. The more convenient the product, the longer the ingredient list, and I end up turning over every package to read the label. There are special allergy-friendly products, but they are not always on the shelves of the store you actually go to.
On the other hand, some ordinary products use neither egg nor milk. S&B's Golden Curry, for example. Most curry roux contains milk, but this one's label listed neither egg nor milk.
These "surprisingly safe" finds tend to stay inside the family that found them. If we pool them, we can save time for the next person standing in the aisle, unsure. That is why I built ralleru.
In a disaster, allergy-friendly food rarely reaches the people who need it. Sharing "what you can buy where" in everyday life is also preparation for that day.
ralleru team — Itamin
WITH KIDS
My kids help run it
My two children (one in junior high, one in elementary school) take part in ralleru as reviewers.
They look for products themselves and find what they can eat themselves. Not just eating what a parent picked, but learning to check the label and choose. I want ralleru to be a tool for that, too.
What ralleru aims for
We are not trying to list every product. What matters is passing on the "surprisingly safe" discoveries — "curry roux must have milk in it… oh, this one doesn't" — from the person who found it to the next.
In a disaster, allergy-friendly food rarely reaches the people who need it. Sharing "what you can buy where" in everyday life is also preparation for that day.
Using ralleru in English
So that families from abroad living in Japan can use it too, the interface can be switched to English. Product names, makers and ingredients stay in Japanese so you can match them against the package in the store. Allergen names (egg, milk, wheat and so on) are shown in English.
About the 29 allergens
Under Japan's revised food labeling standard (in force from April 1, 2026), cashew became a mandatory allergen and pistachio was added to the recommended list. ralleru records the post-revision set: 9 mandatory and 20 recommended allergens, 29 in total.
Makers are not required to label the 20 recommended allergens. Allergens that cannot be confirmed from the label are treated as "Unconfirmed" and never counted as "not used" in search.
How we prevent mistakes
- 1"Not used" needs evidence
You cannot mark an allergen "Not used" without a photo of the ingredient label or a link to the maker's official page.
- 2Edits toward danger go live at once; edits toward safety wait for review
Changing something to "Contains" is applied immediately. Removing "Contains" or setting "Not used" is applied only after a reviewer checks the evidence.
- 3One "it was different" report hides the food
A food reported as differing from its label is removed from search results until it is reviewed.
- 4Every edit is recorded
Anyone can see who changed what and when in each food's edit history.
- 5Old information is flagged
Foods that no one has checked for over a year carry a warning that the ingredients may have changed.
Posting rules
- Only post what you have checked yourself on the package or the official page.
- If unsure whether something is contained, choose "Unconfirmed".
- Posts that unfairly disparage a product, advertising, and medical advice will be removed.
- Do not post personally identifying information such as children's names or faces.
About ads
ralleru is funded by affiliate programs such as Amazon Associates, Rakuten Affiliate and ValueCommerce. The "Amazon", "Rakuten", "Yahoo!" and "au PAY" buttons on food pages are affiliate links. Advertising never influences what we list or how we review it.
Please note
Information on ralleru is entered by users from package labels and makers' public information. It is not a guarantee that a food will not cause a reaction. Ingredients can change without notice, so always check the label on the actual package before eating. Cross-contamination from shared factories or production lines may not be labeled. If you or your child has severe allergies, follow your doctor's instructions.
Operated by Tanaka Daisuke Inc.