Generally, when we buy snacks, snacks or whatever, there will be a concept of "shelf life" on it, and it is not recommended after this time. The world's use of goods basically have this concept, but the Japanese side generally uses the "taste period" instead of the "shelf life", which means that if you eat within this time, you can experience the most perfect and delicious state of this food, but after this time, you can generally eat it, but it is not recommended. Recently, a Japanese netizen sent a message to the Internet caused some melon eating masses to watch, he opened a can of pineapple cans 5 years ago, the color became very touching, some netizens complained that this has become black pineapple.
The netizen said that this can of pineapple has passed the "appreciation period" for 5 years. Generally speaking, the shelf life of canned food is still relatively long, 3 to 5 years are normal, and even the canned food is let go, which is really powerful. Generally fresh canned pineapple should be yellow-orange-orange, full and with a lot of soup, which is really unseen to put into this way, is this friend doing social practice?
This reminds me of similar scenes in some anime works, such as Our "Naruto" anime Comrade Naruto, when he was a child, bitter, lived alone, his parents were gone, he didn't care much about his diet, often junk food such as instant noodle potato chips, and often ate expired things, diarrhea or something, the original plot of several episodes of the anime was because Naruto ate expired food and caused some jokes.
For example, Comrade Akihisa Yoshii in the anime "Stupid Test Summoning Beast", although his parents are also giving him full living expenses every month, but he is extremely poor because he takes the money to buy games and Hideyoshi's photos, usually only eating n small portions of instant noodles and salt and water, relying on cooking oil to supplement calories, for such dark food is afraid that he will not give up.