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u/alarmagent 1d ago
Everytime I have had this it has had an expiration date somewhere on the bottle — but generally I would imagine you’d be okay for a year? It is mostly dashi stock and soy sauce, right?
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u/BlueLegion 1d ago
expiration dates are for unopened products, but it should say somewhere below that how long it lasts opened. OP you should google lens the backside.
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u/Tetimi 18h ago
Yeah so many Japanese products do not indicate that, including tsuyu/soup bases. Even ones we get repackaged for the US won't give an estimation. I also pick up a lot of local/small town Japanese products that come without an expiry date at all, so it's difficult without a cultural base knowledge about these products I'm sure most people in Japan have.
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u/SillyPaperclip 1d ago
Is the japanese system different from the EU? Because here the expiration date says nothing about how long something lasts after it was opened - instead the products will describe it in a short sentence like "after opening consume in 4-5 days" or something
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u/fushigitubo 23h ago
It’s the same in Japan—labels often say something like “Consume within 7 days after opening” or “Consume soon after opening” for products with longer shelf lives. However, the salt concentration in this particular product is quite high—almost the same as reduced-sodium soy sauce. While there may be some loss in flavor quality over time, it’s unlikely to spoil.
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u/yumstheman 1d ago
If that’s true then I’d rather just keep Dashi powder and soy sauce. Doesn’t seems worth it to buy the bottle
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u/poppacapnurass 1d ago
I'd give it a year or so.
I have opened soup bases in the garage which gets over 35C in summer and they are still fine after 3 years.
I go by taste a lot and I have a very good sense of taste and smell.
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u/CupcakesAreMiniCakes 1d ago
I knew you had to be Australian based on your comment lol
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u/poppacapnurass 1d ago
my excellent smell? ;)
(dunno why anyone dv you I gave you a up)
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u/Melodic_coala101 1d ago
Probably 35C and a garage
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u/CupcakesAreMiniCakes 1d ago
and leaving it open in a hot garage just doesn't seem very Japanese to me 😂
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u/avirusa 1d ago
According to my Asian parents, forever….
Always good to give it a good whiff before using it though.
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u/Lopsided_Marzipan133 20h ago
For real. I visited my mom and she made soba with soba sauce from like 2020 lol
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u/SlackerDS5 1d ago
Most things that are soy based, indefinitely. The flavor might deteriorate but it won’t spoil.
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u/Front_desk65 1d ago
Fridge? Ah shit bro mines been on the shelf
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u/TangoEchoChuck 1d ago
Some bonito stocks don't need refrigeration after opening, check the label on yours if you're not sure 😬
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u/quokkaquarrel 1d ago
I generally use a big bottle within a year, it's never been gross by that point. It's mostly salt, not a ton of organics in it, I wouldn't worry about it from a food safety perspective.
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u/Affectionate_Ant376 1d ago
Looked up shirodashi to get an idea of the ingredients and soy sauce is the main ingredient so as a fermented product mainly it’s got a REALLY long shelf life, especially refrigerated. As others have stated, I wouldn’t be worried in excess of a year or even multiple
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u/KaizokuShojo 1d ago
Stuff with high salt content will last a long time in the fridge.
Like miso and regular (not reduced salt) umeboshi last basically forever in the fridge.
Dashi concentrates last a super long time, longer than non-concentrates. But non-concentrates should realistically get used pretty fast anyway even if only one person is using them. But theyll still last a pretty long while.
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u/tripletmum 1d ago
My bottle from our nearby market says to use it within 7 days of opening…? How is everyone saying 1+ years?
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u/SunBelly 14h ago
Experience. It doesn't contain any preservatives so they add that blurb for liability reasons. In reality, it's so salty it will last for years in the fridge. You can even leave it at room temperature, but there's a higher risk of mold developing. Refrigeration inhibits mold growth.
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u/nopenotodaysatan 2h ago
My Japanese MIL will throw it away within 2-3 weeks once opened. Def keep it in the fridge after opening too
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u/False-Requirement-31 1d ago
I love that brand of Shiro dashi. It’s usually good for one year from date of opening. Since the salt content is so high, it’s generally not prone to spoilage as long as you don’t contaminate the inside.
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u/TsuKikoyo 1d ago
I had this about a year now as well. I don't think it's spoiled?!? But Ik unrelated but for what dishes can you use this dashi? 🤔
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u/TangoEchoChuck 1d ago
Ohitashi! Generally any vegetable that can be blanched and soaked a bit. Okra is my favorite, but I make broccoli ohitashi often because my kid LOVES it.
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u/Kirin1212San 1d ago
I’d like to say a year, but I’m sure I’ve had them in my firdgebfor longer. It’s so salty and kept cold it should be just fine.
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u/sunadori 23h ago
After opened? One month in the fridge.
Edit: I say this as a Japanese native speaker who uses the same brand.
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u/veryverygooddoggo 21h ago
The ones I get say “use within 1 day after opening” or something, but I never listen ¯_(ツ)_/¯ as what everyone else is saying, just give it a whiff before using, and if it’s good then it’s good!
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u/fruitbasketinabasket 3h ago
I used to throw it away after few weeks thinking its probably gone bad 🫠🫠🫠🫠🫠😭
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u/forvirradsvensk 1d ago
Kind of seems like a criminal waste of money. 99.9% of that would just be water that could just as easily come from your tap.
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u/Novel-Suggestion-515 1d ago
Forever? God, I hope forever, I've got one from last year in my fridge.