政府の備蓄米放出をめぐる問題がやかましいが、私が特に興味をいただいているのが、「備蓄米の風味」についてである。 というのも、過去、ワインの保存において、温度管理や光その他の要素が品質に与える影響を痛感してきたからだ。 今回は、対象が米ということで、ワインよりはむしろコーヒー豆などの保存に近いのだろうと思う。コーヒーの保存について、私は素人の域を出ないが、かつて興味本位で以下のような記事を書いたことがあった。 The government’s release of stockpiled rice has been a noisy topic lately, but what I’m particularly interested in is its flavor. That’s because, in the past, I’ve experienced firsthand how factors like temperature control, light, and other storage conditions can affect the quality of wine. In this case, since we’re talking about rice, I imagine the situation is closer to storing coffee beans than wine. I’m no expert when it comes to coffee storage, but out of curiosity, I once wrote the following article on the topic.
今回販売されている備蓄米については、「玄米の状態(精米していない)」で「密閉されたパッケージ」かつ「低温倉庫」で保存されるというから、コンディション的にはかなり配慮されていると言ってよいだろう(ワインだとこれに加えて、「極力動かさない」とか「一定の湿度を保つ」といった要素が加わるところだ)。 As for the stockpiled rice currently being sold, it is said to have been stored unmilled (in brown rice form), in sealed packaging, and in temperature-controlled warehouses. From a storage standpoint, that’s quite a considerate approach. (With wine, you would add factors like “minimizing movement” and “maintaining consistent humidity” on top of that.)
Discussions like this are much the same as with wine or coffee: those who care will scrutinize every detail, while those who don’t will hardly give it a second thought. In this case in particular, the population in question is different from that of “wine enthusiasts,” and if we mix the opinions of a handful of professionals with the impressions of the general public, it becomes harder to grasp the overall picture. What’s more, people regarded as experts each have their own pride, so they’re unlikely to casually say, “There’s not much difference.” And if you were to conduct a blind tasting, they would probably try their hardest to find flaws—leading them, almost inevitably, toward the conclusion that “there is a difference.”
Taking these factors into account, here’s my gut feeling:
If stored for only a few years under good conditions, oxidation will likely have been kept to a minimum, so freshly cooked, the rice should taste just fine.
Depending on the quality of the packaging, the sealing ability can weaken over the years, allowing air to get in and oxidation to progress. It’s like how an ordinary PET bottle for mineral water can’t be treated the same as a five-year-storage-grade PET bottle. That said, since government stockpiled rice is apparently stored in tanks or silos, I would imagine there’s no major problem as long as it hasn’t been handled roughly in the course of its release.
What worries me more is the possibility that, under the cover of this government rice release, some older rice—already milled and packaged years ago—might quietly make its way into circulation. That would be a different beast entirely.
In any case, it’s best to avoid anything that’s been resold multiple times or whose origin isn’t clear.
As for rice whose flavor has already faded, it’s best to use it for dishes where that won’t be an issue—just as with wine turned into sangria or coffee beans turned into ready-to-drink coffee beverages. Curry, fried rice, or seasoned rice dishes would all work well.