Shelf Life: Sealed Versus Opened
The date printed on the package applies to the unopened product. Opening starts a different clock. Matcha products commonly carry best-before dates in…
July 1, 2025
Storage & Quality Control
保存・品質管理
15 articles
Keeping Quality After Opening
Packaging protects until the seal breaks. After that, conditions are whatever your kitchen provides. Matcha's green comes from chlorophyll, which degrades…
July 1, 2025
Room Temperature, Refrigerator, or Freezer?
For a package you will finish within about two weeks, room temperature is the easiest to manage. Cold storage helps mainly with larger quantities or hot…
July 7, 2025
How Long Does the Prepared Drink Keep?
Powder and liquid are entirely different situations. Dried foods have low water activity — generally at or below Aw 0.65 — and microorganisms cannot…
July 14, 2025
Tins and Storage Containers
Whether to transfer depends on quantity and pace. Finishing within about two weeks? The original packaging is fine. Transferring exposes the powder to…
July 22, 2025
Caked Powder: Fixing It and Preventing It
Caking is a moisture problem, almost without exception. Water on particle surfaces forms bridges between them. As it dries, those bridges harden into…
August 3, 2025
Recognizing When Matcha Has Declined
The printed date says nothing about the current state, particularly after opening. Four things to check. Matcha's green comes from chlorophyll, which…
August 18, 2025
Storing Matcha Through Humid Weather
Rising humidity and temperature together create the worst conditions for powder. Moisture on particle surfaces forms bridges that harden into clumps.…
September 1, 2025
Carrying Matcha Powder With You
Light, shelf-stable, no refrigeration. Good travel characteristics, with two things to watch. Carrying a large bag is impractical. Transfer what you need…
September 15, 2025
Does Sweetened Matcha Keep Longer Than Plain?
Generally yes, and the reason is the sugar. Water in a food divides into free water and bound water. Only free water is available to microorganisms. Sugar…
September 23, 2025
Keeping Powder from Scattering
Matcha particles run 1 to 10 microns, an order of magnitude below wheat flour at 30 to 60. That fineness is why it goes airborne so readily. Air pushes…
October 4, 2025
Matcha Picks Up Odors
Aroma is the point of matcha. The same properties that let it release aroma let it absorb it. Particles run 1 to 10 microns, so the surface exposed to air…
November 16, 2025
Is the Resealable Bag Good Enough?
For short-term use, yes. It will not match a tin. A zip closure does not seal completely. Each opening admits a little air. Material matters as much as…
November 17, 2025
Are Desiccants and Oxygen Absorbers Worth Using?
Some products include them. Whether adding your own is worthwhile depends on the situation. They absorb moisture, keeping the container dry. Effective…
November 18, 2025
Can You Freeze Matcha?
Yes, with conditions. Done carelessly it backfires. Lower temperature slows oxidation and aroma loss. For long-term storage the logic is sound. Freezing…
November 19, 2025
