In a lot of ways, convenience stores in Japan are more like miniature supermarkets. So while they still sell a lot of the candy and canned beverages their counterparts in other countries specialize in, you can also find plenty of edible, even gourmet-sounding food.
For example, the chain FamilyMart sells pouches of fried scallop meat, specifically the mantle, or part of the animal that attaches it to its shell. There’s a certain level of risk that comes with eating any mass-produced foodstuff, though, as one customer found out when he found what he felt was a foreign object in his pack of marine mollusks. And while generally the only thing you want to find in your food is, well, food, we suppose if we had to find something else mixed in there, we’d want what he discovered hiding in his snack: a pearl.