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Care and handling of Kewpie Mayonnaise

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So I was at the Japanese market the other day and came across a display of Kewpie Mayonnaise. Having remembered posts here about it's unique taste and remembering that style from some past Japanese restaurant meals, I bought some. (I only saw one size on the shelf.)

Now that I've got it home I see that the package says it should be consumed within 30 days of opening. I would assume that has to do with it being made without the preservatives of a typical Hellman's Best Foods. Anyway............... my question is about whether that is a hard and fast rule from the knowledge or experience of those here. I don't use that much mayo and want to know if I can stretch that timing if I need to, without paying an uncomfortable price.

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  1. My guess for Kewpie would be between three and six months, in the refrigerator. It's quite a durable product, and doesn't seem to go bad quickly. I think the "30 days" designation is to accelerate consumption, myself. But YMMV, and keep a close eye on it after the first month.

    1. I have a bottle of QP that's been in the fridge for like 9 months...still tastes fine to me.

      1 Reply
      1. re: joonjoon

        I have a bottle that I'd guess is nearly 2 years old, I just had some tonight and it tasted fine.

      2. In the fridge, it'll last as long as your typical Hellman's.

        1. Thanks folks. I've opened the package and will refrigerate worry-free 'til gone or icky-looking/smelling/tasting.